SMA MVPS 500SC-JP, MVPS 630SC-JP, MVPS 800SC-JP, MVPS 1000SC-JP, MVPS 1250SC-JP System Manual
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SystemManual
MEDIUM VOLTAGE POWER STATION 500SC-JP/ 630SC-JP/
800SC-JP/ 1000SC-JP/ 1250SC-JP/ 1600SC-JP
MVPS22JP-SH-en-11 | 101817-00.01 | Version 1.1
ENGLISH
Legal Provisions
SMA Solar Technology AG
Legal Provisions
The information contained in these documents is property of SMA Solar Technology AG. Any publication, whether in
whole or in part, requires prior written approval by SMA Solar Technology AG. Internal reproduction used solely for
the purpose of product evaluation or other proper use is allowed and does not require prior approval.
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SMASolarTechnologyAG
Sonnenallee 1
34266 Niestetal
Germany
Tel. +49 561 9522-0
Fax +49 561 9522-100
www.SMA.de
E-mail: info@SMA.de
© 2004 to 2015SMASolarTechnologyAG. All rights reserved.
System ManualMVPS22JP-SH-en-112
SMA Solar Technology AG
Table of Contents
Table of Contents
1 Information on this Document ..................................................................................................... 12
1.1 Validity .............................................................................................................................................................. 12
1.2 Target Group .................................................................................................................................................... 12
1.3 Additional Information...................................................................................................................................... 12
1.4 Symbols............................................................................................................................................................. 12
1.5 Typographies.................................................................................................................................................... 13
1.6 Nomenclature................................................................................................................................................... 13
2 Safety............................................................................................................................................. 14
2.1 Intended Use..................................................................................................................................................... 14
2.2 Safety Information ............................................................................................................................................ 15
2.3 Personal Protective Equipment......................................................................................................................... 18
3 Product Overview......................................................................................................................... 19
3.1 System Overview.............................................................................................................................................. 19
3.2 Design of the MV Power Station ..................................................................................................................... 19
3.3 Design of the inverter ....................................................................................................................................... 20
3.4 Devices of the Inverter...................................................................................................................................... 21
3.5 Devices of the MV Transformer ....................................................................................................................... 22
3.6 Devices of the Medium-Voltage Compartment............................................................................................... 22
3.7 Devices of the Medium-Voltage Switchgear................................................................................................... 23
3.8 Devices of the Station Subdistribution............................................................................................................. 24
3.9 Devices of the Communit ................................................................................................................................. 24
3.10 Oil Tray ............................................................................................................................................................. 25
3.11 Transformer for Internal Power Supply............................................................................................................ 26
3.12 Circuitry Principle of the MV Power Station.................................................................................................... 26
3.13 Operating and Display Elements..................................................................................................................... 27
3.13.1 Switch in the Inverter........................................................................................................................................ 27
3.13.1.1 Key Switch........................................................................................................................................................ 27
3.13.1.2 AC Disconnection Unit .................................................................................................................................... 28
3.13.1.3 DC Switchgear................................................................................................................................................. 28
3.13.2 Switch in the Station Subdistribution............................................................................................................... 29
3.13.3 Switch on the Medium-Voltage Switchgear ................................................................................................... 30
3.13.4 Switch on the Control Device for Cascade Control....................................................................................... 30
3.13.5 Touch Display................................................................................................................................................... 31
3.13.5.1 Design............................................................................................................................................................... 31
3.13.5.2 Explanation of Symbols................................................................................................................................... 31
3.13.6 LEDs of the SC-COM ....................................................................................................................................... 35
3.13.6.1 LEDs on the Enclosure...................................................................................................................................... 35
3.13.6.2 LEDs on the Network Port................................................................................................................................ 36
3.13.6.3 LEDs on the Optical Fiber Terminals............................................................................................................... 37
3.13.7 User Interface ................................................................................................................................................... 37
3.13.7.1 Design of the User Interface............................................................................................................................ 37
3.13.7.2 Tree View and Device View............................................................................................................................ 38
3.13.7.3 Status Symbols................................................................................................................................................. 38
3.14 Symbols on the Product.................................................................................................................................... 39
4 Transport and Mounting .............................................................................................................. 40
4.1 Safety during Transport and Mounting........................................................................................................... 40
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4.2 Requirements for Transport and Mounting ..................................................................................................... 41
4.2.1 Requirements and Ambient Conditions........................................................................................................... 41
4.2.2 Center of Gravity Marker................................................................................................................................ 41
4.3 Transporting the MV Power Station Using a Crane....................................................................................... 41
4.4 Transporting the MV Power Station by Truck, Train and Ship....................................................................... 42
4.5 Removing the Supplied Mounting Material from the MV Power Station...................................................... 42
4.6 Attaching the Support Feet to the MV Power Station..................................................................................... 43
4.7 Mounting the MV Power Station ..................................................................................................................... 45
5 Installation..................................................................................................................................... 49
5.1 Safety during Installation ................................................................................................................................. 49
5.2 Installation Sequence ....................................................................................................................................... 51
5.3 Preparatory Work............................................................................................................................................. 52
5.3.1 Removing the Transport Locks from the Inverter Compartment..................................................................... 52
5.3.1.1 Loosening the Tie-Down Straps ....................................................................................................................... 52
5.3.1.2 Removing the Air Cushion ............................................................................................................................... 52
5.3.1.3 Opening the Drain Orifices in the Inverter Compartment ............................................................................. 53
5.3.2 Mounting the Exhaust Duct under the Inverters.............................................................................................. 53
5.3.3 Removing the Transport Lock from the MV Transformer Compartment ........................................................ 54
5.3.4 Working in the Compartment of the Medium-Voltage Switchgear............................................................... 55
5.3.5 Removing the Desiccant Bags ......................................................................................................................... 56
5.3.5.1 Removing the Desiccant Bag from the Station Container ............................................................................. 56
5.3.5.2 Replacing the Desiccant Bag in the Inverter .................................................................................................. 56
5.3.6 Connecting the Battery to the Control Device of the Cascade Control........................................................ 56
5.4 Installing the Grounding on the Station Container......................................................................................... 57
5.5 Installing the AC Connection ........................................................................................................................... 58
5.5.1 Installing the AC Connection on the Medium-Voltage Switchgear............................................................... 58
5.5.2 Installing the AC Connection on the MV Transformer ................................................................................... 59
5.6 Installing the DC Connection ........................................................................................................................... 60
5.6.1 Connecting the DC Cable to the Busbar ........................................................................................................ 60
5.6.2 Connecting the DC Cables to the Connection Brackets................................................................................ 62
5.7 Connecting the Cables for Communication, Control, Supply Voltage and Monitoring .............................. 63
5.7.1 Connecting the Cables in the Communit ........................................................................................................ 63
5.7.1.1 Connecting Optical Fibers .............................................................................................................................. 63
5.7.1.2 Connecting the Network Cables .................................................................................................................... 64
5.7.2 Connecting the Cable in the Inverter .............................................................................................................. 65
5.7.2.1 Connecting Optical Fibers with Subscriber Connector ................................................................................. 65
5.7.2.2 Connecting Optical Fibers via Optical Fiber Pigtail ...................................................................................... 67
5.7.2.3 Connecting the Network Cables .................................................................................................................... 68
5.7.2.4 Connecting Cables for Analog Setpoints....................................................................................................... 69
5.7.2.5 Connecting the Cable for the External Fast Stop........................................................................................... 69
5.7.2.6 Connecting the Cable for Remote Shutdown................................................................................................. 70
5.7.2.7 Connecting the Cable for the Status Report of the Insulation Monitoring ................................................... 70
5.7.2.8 Connecting the Cable for the Status Report of the AC Contactor Monitoring ............................................ 70
5.7.2.9 Connecting the Data Cable of the Sunny String-Monitor ............................................................................. 71
5.8 Completion Work............................................................................................................................................. 71
5.8.1 Closing the Base Plates on the Inverter........................................................................................................... 71
6 Commissioning.............................................................................................................................. 72
6.1 Safety during Commissioning .......................................................................................................................... 72
6.2 Requirements for Commissioning..................................................................................................................... 73
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6.3 Visual Inspection and Mechanical Test........................................................................................................... 74
6.3.1 Sequence for Visual Inspection and Mechanical Test ................................................................................... 74
6.3.2 MV Power Station ............................................................................................................................................ 74
6.3.2.1 Checking the Grounding ................................................................................................................................. 74
6.3.2.2 Checking the High-Current Contacts Made at the Factory ........................................................................... 75
6.3.2.3 Checking the Connections of the Cables for Communication, Control Supply Voltage and Monitoring.. 75
6.3.2.4 Checking the High-Current Contacts Made at the Installation Site .............................................................. 75
6.3.3 Sunny Central................................................................................................................................................... 76
6.3.3.1 Checking the Settings of the Switching Units ................................................................................................. 76
6.3.3.2 Checking the Connectors ................................................................................................................................ 76
6.4 Connection and Measurement ....................................................................................................................... 76
6.4.1 Sequence for Connection and Measurement ................................................................................................ 76
6.4.2 Adjusting the Transmission Ratio of the MV Transformer............................................................................... 77
6.4.3 Checking the Voltages of the MV Transformer .............................................................................................. 77
6.4.4 Checking and Connecting the Supply Voltage.............................................................................................. 77
6.4.5 Checking the Output Voltage of the Inverter.................................................................................................. 77
6.4.6 Checking the DC Voltage................................................................................................................................ 78
6.4.7 Switching On the Supply Voltage and the AC Disconnection Unit .............................................................. 78
6.5 Configuration.................................................................................................................................................... 79
6.5.1 Checking the Settings of the Protective and Control Devices........................................................................ 79
6.5.2 Configuring the Network Settings on the Computer...................................................................................... 81
6.5.3 Information on Integrating the Inverter into a Local Network ....................................................................... 81
6.5.4 Configuring the Inverter for a Static Network ................................................................................................ 82
6.5.5 Adjusting Network Ports .................................................................................................................................. 82
6.5.6 Detecting New Devices ................................................................................................................................... 83
6.5.7 Setting the Power Limitation............................................................................................................................. 83
6.5.7.1 Setting the Active Power Ramp-Up ................................................................................................................. 83
6.5.7.2 Setting the Frequency-Dependent Active Power Limitation ........................................................................... 84
6.5.7.3 Setting the Frequency-Independent Active Power Limitation......................................................................... 84
6.5.7.4 Setting Reactive Power Control....................................................................................................................... 85
6.5.7.5 Setting Q at Night ........................................................................................................................................... 85
6.5.8 Setting Grid Monitoring and Grid Limits......................................................................................................... 86
6.5.8.1 Setting Grid Voltage Monitoring .................................................................................................................... 86
6.5.8.2 Setting Power Frequency Monitoring ............................................................................................................. 86
6.5.8.3 Activating the Manual Resume Mode ............................................................................................................ 87
6.5.9 Setting the Grid Support.................................................................................................................................. 87
6.5.9.1 Setting Full and Limited Dynamic Grid Support (FRT) ................................................................................... 87
6.5.9.2 Setting Enable Islanding Detection ................................................................................................................. 87
6.5.9.3 Setting the Medium Voltage ........................................................................................................................... 88
6.5.10 Setting the Remote Shutdown.......................................................................................................................... 88
6.5.11 Setting the String Current Monitoring ............................................................................................................ 88
6.5.11.1 Detecting the Sunny Central String-Monitor Controller and the Inverter...................................................... 88
6.5.11.2 Setting the Date and Time of the Sunny Central String-Monitor Controller ................................................. 88
6.5.11.3 Detecting the Sunny String-Monitors via the Sunny Central String-Monitor Controller............................... 88
6.5.11.4 Redetecting the Sunny String-Monitors via the Sunny Central String-Monitor Controller ........................... 89
6.5.11.5 Detecting the Sunny String-Monitors via the Communication Unit ............................................................... 89
6.5.11.6 Adjusting the Identification of the Sunny String-Monitors.............................................................................. 89
6.5.12 Changing System Settings via Touch Display ................................................................................................ 90
6.5.12.1 Selecting the Language................................................................................................................................... 90
6.5.12.2 Setting the Date, Time and Time Zone ........................................................................................................... 90
6.5.12.3 Selecting the Display Format........................................................................................................................... 90
6.5.12.4 Setting the Brightness....................................................................................................................................... 90
6.5.13 Changing the System Settings via the User Interface .................................................................................... 90
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6.5.13.1 Selecting the Language................................................................................................................................... 90
6.5.13.2 Setting the Date, Time and Time Zone ........................................................................................................... 91
6.5.13.3 Entering the Operator Name.......................................................................................................................... 91
6.5.13.4 Changing the Password for the User Groups................................................................................................ 91
6.5.14 Configuring System Settings via XML File....................................................................................................... 92
6.5.14.1 Uploading the File custom.xml........................................................................................................................ 92
6.5.14.2 Downloading the File custom.xml................................................................................................................... 92
6.5.14.3 Deleting the File custom.xml............................................................................................................................ 92
6.5.15 Resetting the Communication Unit................................................................................................................... 93
SMA Solar Technology AG
6.6 Function Test...................................................................................................................................................... 93
6.6.1 Checking the Fans............................................................................................................................................ 93
6.6.2 Checking the Heating Elements and Hygrostat.............................................................................................. 94
6.7 Switching the Inverter On................................................................................................................................. 95
7 Disconnecting and Reconnecting................................................................................................. 96
7.1 Safety When Disconnecting and Reconnecting Voltage Sources................................................................. 96
7.2 Connection Point Overview ............................................................................................................................. 98
7.2.1 Power Connection Points ................................................................................................................................. 98
7.2.2 Connection Points for Supply Voltage ............................................................................................................ 99
7.3 Disconnecting the Supply Voltages of the Station Subdistribution................................................................ 99
7.4 Disconnecting the Inverter................................................................................................................................100
7.4.1 Switching off the Inverter .................................................................................................................................100
7.4.2 Disconnecting the DC Side..............................................................................................................................100
7.4.3 Disconnecting the AC Side..............................................................................................................................100
7.4.4 Disconnecting the Supply Voltage and External Voltages ............................................................................100
7.5 Disconnecting the MV Transformer .................................................................................................................101
7.6 Disconnecting the MV Power Station..............................................................................................................101
7.7 Reconnecting the MV Power Station...............................................................................................................102
7.8 Reconnecting the MV Transformer ..................................................................................................................102
7.9 Reconnecting the Inverter.................................................................................................................................103
7.9.1 Reconnecting the Supply Voltage and External Voltages .............................................................................103
7.9.2 Reconnecting the AC Side...............................................................................................................................104
7.9.3 Reconnecting the DC Side...............................................................................................................................104
7.9.4 Restarting the Inverter ......................................................................................................................................104
7.10 Reconnecting the Supply Voltage of the Station Subdistribution ..................................................................104
8 Operation......................................................................................................................................105
8.1 Safety during Operation..................................................................................................................................105
8.2 Displaying Operating Data .............................................................................................................................105
8.2.1 Displaying Operating Data via the User Interface ........................................................................................105
8.2.2 Displaying the Operation Data via Sunny Portal...........................................................................................106
8.2.2.1 Registering the Inverter in Sunny Portal .......................................................................................................... 106
8.2.2.2 Adjusting the PV System Identifier for Sunny Portal ....................................................................................... 106
8.2.2.3 Deleting the Sunny Portal Buffer ..................................................................................................................... 106
8.3 Saving Operating Data....................................................................................................................................107
8.3.1 Reducing Storage Capacity by Averaging ....................................................................................................107
8.3.2 Setting the Data Transmission Frequency .......................................................................................................107
8.3.3 Downloading Operating Data Using the FTP Server.....................................................................................107
8.3.3.1 Defining Read and Write Access Rights......................................................................................................... 107
8.3.3.2 Accessing the FTP Server via the Web Browser ............................................................................................ 108
8.3.3.3 Activating Automatic Data Transmission via FTP Push ................................................................................... 108
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8.3.4 Downloading Operating Data via HTTP Download......................................................................................109
8.3.4.1 Downloading Data in XML Format ................................................................................................................. 109
8.3.4.2 Downloading Data in CSV Format ................................................................................................................. 109
8.3.5 Saving Operating Data on a Memory Card..................................................................................................110
8.3.5.1 Information on Saving Data on a Memory Card .......................................................................................... 110
8.3.5.2 Inserting the Memory Card ............................................................................................................................. 111
8.3.5.3 Enabling Data Storage on the Memory Card ............................................................................................... 111
8.3.5.4 Displaying the Memory Capacity Available on the Memory Card ............................................................. 111
8.4 Updating the Firmware ....................................................................................................................................111
8.4.1 Automatic Update............................................................................................................................................111
8.4.2 Update via User Interface ...............................................................................................................................112
8.5 Changing the Insulation Monitoring................................................................................................................112
8.5.1 Insulation Monitoring with GFDI and Insulation Monitoring Device ...........................................................112
8.5.1.1 Safety with insulation monitoring with GFDI and insulation monitoring device ........................................... 112
8.5.1.2 Switching to Insulated Operation ................................................................................................................... 112
8.5.1.3 Switching to Grounded Operation ................................................................................................................. 113
8.5.2 Insulation Monitoring with Remote GFDI and Insulation Monitoring Device...............................................113
8.5.2.1 Information on Insulating PV Modules with Remote GFDI and Insulation Monitoring Device ................... 113
8.5.2.2 Switching to Insulated Operation ................................................................................................................... 113
8.5.2.3 Switching to Grounded Operation ................................................................................................................. 113
8.6 Deleting the Device Description.......................................................................................................................114
8.7 Sending a ZIP File with Service Information ...................................................................................................114
9 Troubleshooting ............................................................................................................................115
9.1 Safety during Troubleshooting.........................................................................................................................115
9.2 Troubleshooting in the Medium-Voltage Compartment .................................................................................115
9.3 Troubleshooting in the Inverter ........................................................................................................................118
9.3.1 Activating Alert in the Event of a Fault............................................................................................................118
9.3.2 Reading Off Disturbance Messages...............................................................................................................119
9.3.2.1 Reading Off Error Messages via Touch Display............................................................................................ 119
9.3.2.2 Reading Off Disturbance Messages via the User Interface .......................................................................... 119
9.3.2.3 Enabling Automatic Read-Out of Events......................................................................................................... 119
9.3.2.4 Displaying and Downloading the Event Report............................................................................................. 119
9.3.3 Acknowledging Disturbance Messages .........................................................................................................120
9.3.3.1 Acknowledging Disturbance Messages via the Key Switch ......................................................................... 120
9.3.3.2 Acknowledging Disturbance Messages via the User Interface .................................................................... 120
9.3.4 Remedial Action in Case of Disturbances.......................................................................................................120
9.3.4.1 Inverter Behavior in Case of Disturbances ..................................................................................................... 120
9.3.4.2 Explanation of the Error Tables....................................................................................................................... 122
9.3.4.3 Error Numbers 01xx to 13xx - Disturbance on the Utility Grid .................................................................... 122
9.3.4.4 Error Numbers 34xx to 40xx - Disturbance on the PV Array ....................................................................... 125
9.3.4.5 Error Numbers 6xx to 9xx - Disturbance on the Inverter .............................................................................. 127
9.3.4.6 Displaying Disturbance Messages for Active Power Limitation .................................................................... 131
9.3.4.7 Displaying Disturbance Messages for the Reactive Power Setpoint ............................................................ 132
10 Maintenance .................................................................................................................................133
10.1 Safety during Maintenance .............................................................................................................................133
10.2 Maintenance Schedule and Consumables.....................................................................................................133
10.2.1 Notes on Maintenance Work .........................................................................................................................133
10.2.2 Maintenance Work Every 12 Months............................................................................................................134
10.2.2.1 Station Container............................................................................................................................................. 134
10.2.2.2 Medium-Voltage Compartment....................................................................................................................... 134
10.2.2.3 MV Transformer ............................................................................................................................................... 135
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10.2.2.4 Medium-Voltage Switchgear........................................................................................................................... 136
10.2.2.5 Station Subdistribution..................................................................................................................................... 136
10.2.3 Maintenance Work Every 24 Months............................................................................................................136
10.2.3.1 Station Subdistribution..................................................................................................................................... 136
10.2.3.2 Medium-Voltage Switchgear........................................................................................................................... 136
10.2.3.3 Low-Voltage Meter (GSE) ............................................................................................................................... 136
10.2.3.4 Sunny Central................................................................................................................................................... 137
10.2.4 Maintenance Work Every 6 Years..................................................................................................................138
10.2.5 Maintenance Work Every 10 Years ...............................................................................................................138
10.2.6 Demand-Based Maintenance..........................................................................................................................138
10.2.6.1 All Devices........................................................................................................................................................ 138
10.2.6.2 Oil Tray............................................................................................................................................................. 139
SMA Solar Technology AG
10.3 Repair Schedule and Spare Parts....................................................................................................................139
10.3.1 Information on Repair Work............................................................................................................................139
10.3.2 Demand-Based Repairs....................................................................................................................................139
10.3.3 Repairs every 5 Years......................................................................................................................................139
10.3.4 Repairs every 10 Years ...................................................................................................................................140
10.3.5 Repairs every 13 Years ...................................................................................................................................140
10.4 General Maintenance Work ...........................................................................................................................140
10.4.1 Performing the Visual Inspection .....................................................................................................................140
10.4.2 Cleaning the Interior ........................................................................................................................................141
10.4.3 Checking the Seals...........................................................................................................................................141
10.4.4 Checking the Latches, Door Stops and Hinges..............................................................................................142
10.4.5 Checking the Inverter Surface .........................................................................................................................143
10.5 Maintenance Work on the Inverter.................................................................................................................144
10.5.1 Analyzing the Temperature Indicators............................................................................................................144
10.5.2 Cleaning the Air Duct and Ventilation Grids..................................................................................................146
10.5.3 Cleaning the Ventilation Plate .........................................................................................................................146
10.5.4 Checking the Fuses/Disconnection Blades.....................................................................................................147
10.5.5 Checking the Bolted Connections of the Power Cabling...............................................................................147
10.5.6 Checking the Surge Arresters..........................................................................................................................148
10.5.7 Checking the Fans............................................................................................................................................149
10.5.8 Checking the Labels.........................................................................................................................................150
10.5.9 Checking the Heating Elements and Hygrostat..............................................................................................152
10.5.10 Checking the Function of the UPS ...................................................................................................................153
10.5.11 Checking the AC Disconnection Unit..............................................................................................................154
10.5.12 Checking the DC switchgear...........................................................................................................................156
11 Disposal .........................................................................................................................................158
12 Periodic Actions.............................................................................................................................159
12.1 Opening and Closing the Doors of the Station Container.............................................................................159
12.2 Setting up the Service Platform at the Medium-Voltage Switchgear Compartment.....................................162
12.3 Mounting and Disassembly Work...................................................................................................................163
12.3.1 Mounting and Disassembly Work in the Inverter...........................................................................................163
12.3.1.1 Disassembling and Mounting the Protective Covers ..................................................................................... 163
12.3.1.2 Disassembling and Mounting the Panels ....................................................................................................... 164
12.3.1.3 Disassembling and Mounting the Ventilation Grids ...................................................................................... 165
12.3.2 Mounting and Disassembly Work in the Medium-Voltage Switchgear........................................................166
12.3.2.1 Disassembling and Mounting the Kick Plates ................................................................................................ 166
12.4 Cable Entry .......................................................................................................................................................167
12.4.1 Inserting the Cables through the Base Plates .................................................................................................167
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12.4.1.1 Overview of the Base Plates on the MV Power Station ................................................................................ 167
12.4.1.2 Inserting Cables through the Base Plates of the Inverters ............................................................................. 167
12.4.1.3 Inserting the Cables through the Base Plates of the Medium-Voltage Switchgear...................................... 168
12.4.1.4 Inserting the Cables through the Cable Glands ............................................................................................ 168
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12.4.2 Inserting the Cables in the Communit .............................................................................................................169
12.4.3 Inserting the Cables .........................................................................................................................................171
12.5 Bolted Connections ..........................................................................................................................................172
12.5.1 Preparing the Grounding and DC Cables for Connection............................................................................172
12.6 Clamp Connections..........................................................................................................................................175
12.6.1 Connecting the Cable to the Spring-Cage Terminals.....................................................................................175
12.6.2 Connecting the Cable Shield Using a Shield Clamping Saddle...................................................................177
12.7 Entering the Password via the Touch Display .................................................................................................177
12.8 Settings on the User Interface of the Inverter..................................................................................................177
12.8.1 Logging Into the User Interface .......................................................................................................................177
12.8.2 Logging Out of the User Interface...................................................................................................................178
12.8.3 Accessing the Parameter Overview ................................................................................................................178
12.8.4 Saving Parameter Changes.............................................................................................................................178
13 Function Description .....................................................................................................................179
13.1 Operating States ..............................................................................................................................................179
13.1.1 Overview of the Operating States ..................................................................................................................179
13.1.2 Stop...................................................................................................................................................................180
13.1.3 Grid Monitoring ..............................................................................................................................................180
13.1.3.1 Monitoring the Grid Voltage........................................................................................................................... 180
13.1.3.2 Monitoring the Power Frequency ................................................................................................................... 181
13.1.4 Grid Monitoring Time Reached.......................................................................................................................181
13.1.5 Startup...............................................................................................................................................................182
13.1.5.1 In Normal Operation: Active Power Ramp-Up .............................................................................................. 182
13.1.5.2 After Grid Fault: Decoupling Protection Ramp............................................................................................... 182
13.1.6 Load Operation................................................................................................................................................182
13.1.6.1 MPP .................................................................................................................................................................. 182
13.1.6.2 Q at Night........................................................................................................................................................ 182
13.1.7 Shutdown..........................................................................................................................................................183
13.1.8 Disturbance.......................................................................................................................................................183
13.2 Safety Functions................................................................................................................................................183
13.2.1 Manual Shutdown Functions...........................................................................................................................183
13.2.1.1 External Fast Stop ............................................................................................................................................ 183
13.2.1.2 Remote Shutdown............................................................................................................................................ 184
13.2.2 Automatic Shutdown Functions .......................................................................................................................184
13.2.2.1 Grid Management Shutdown......................................................................................................................... 184
13.2.2.2 Active Islanding Detection............................................................................................................................... 184
13.2.2.3 Passive Islanding Detection............................................................................................................................. 184
13.2.3 Grounding and Insulation Monitoring............................................................................................................185
13.2.3.1 Mode of Operation......................................................................................................................................... 185
13.2.3.2 GFDI ................................................................................................................................................................. 185
13.2.3.3 Remote GFDI.................................................................................................................................................... 186
13.2.3.4 Insulation Monitoring Device .......................................................................................................................... 187
13.2.3.5 GFDI and Insulation Monitoring Device......................................................................................................... 188
13.2.3.6 Remote GFDI and Insulation Monitoring Device........................................................................................... 189
13.3 Power Control...................................................................................................................................................190
13.3.1 Frequency-Dependent Active Power Limitation ..............................................................................................190
13.3.2 Frequency-Independent Active Power Limitation............................................................................................191
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13.3.2.1 No Active Power Limitation: Off Mode.......................................................................................................... 191
13.3.2.2 Active Power Limitation with Setpoint Command via Modbus Protocol: WCtlCom Mode ........................ 191
13.3.2.3 Active Power Limitation with Absolute Value: WCnst Mode ........................................................................ 191
13.3.2.4 Active Power Limitation as a Percentage of Nominal Power: WCnstNom Mode ...................................... 191
13.3.2.5 Active Power Limitation via Standard Signal: WCnstNomAnIn Mode ........................................................ 192
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13.3.3 Reactive Power Control ...................................................................................................................................192
13.3.3.1 No Reactive Power Control: Off Mode ......................................................................................................... 192
13.3.3.2 Reactive Power Control with Setpoint Command via Modbus Protocol: VArCtlCom Mode...................... 192
13.3.3.3 Reactive Power Control with Setpoint Command via Modbus Protocol: PFCtlCom Mode........................ 192
13.3.3.4 Reactive Power Control with Absolute Value: VArCnst Mode...................................................................... 192
13.3.3.5 Reactive Power Control as a Percentage of the Nominal Power: VArCnstNom Mode ............................. 192
13.3.3.6 Reactive Power Setpoint via Standard Signal: VArCnstNomAnIn Mode .................................................... 193
13.3.3.7 Reactive Power Setpoint via Displacement Power Factor cos φ: PFCnst Mode .......................................... 193
13.3.3.8 Displacement Power Factor cos φ via Standard Signal: PFCnstAnIn Mode................................................ 194
13.3.3.9 Displacement Power Factor cos φ as a Function of Feed-In Power: PFCtlW Mode.................................... 195
13.3.3.10 Reactive Power as a Function of the Grid Voltage: VArCtlVol Mode.......................................................... 195
13.3.3.11 Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic
Curve: VArCtlVolHystDb Mode...................................................................................................................... 196
13.3.3.12 Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic
Curve: VArCtlVolHystDbA Mode ................................................................................................................... 199
13.3.4 Q at Night ........................................................................................................................................................200
13.3.4.1 No Q at Night: Off Mode .............................................................................................................................. 200
13.3.4.2 Q at Night with Operation Command via Modbus Protocol: VArCtlCom Mode....................................... 200
13.3.4.3 Q at Night with Absolute Value: VArCnst Mode .......................................................................................... 200
13.3.4.4 Q at Night as a Percentage of the Nominal Power: VArCnstNom Mode .................................................. 200
13.3.4.5 Q at Night via Standard Signal: VArCnstNomAnIn Mode .......................................................................... 200
13.3.4.6 Q at Night Depending on the Grid Voltage: VArCtlVol Mode.................................................................... 201
13.3.4.7 Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic
Curve: VArCtlVolHystDb Mode...................................................................................................................... 202
13.3.4.8 Measures for Voltage Support through Parameterization of Reactive Power/Voltage Characteristic
Curve: VArCtlVolHystDbA Mode ................................................................................................................... 205
13.3.5 Behavior in the Absence of Active and Reactive Power Setpoints................................................................206
13.4 Structure of the Communication Network.......................................................................................................206
13.5 Grid Management Services.............................................................................................................................208
13.5.1 Dynamic Grid Support (FRT) ...........................................................................................................................208
13.5.1.1 Full and Limited Dynamic Grid Support (FRT)................................................................................................ 208
13.5.1.2 Grid Support in Case of Untervoltage (LVRT)................................................................................................ 208
13.5.1.3 Dynamic Undervoltage Detection................................................................................................................... 209
13.5.1.4 Grid Support in the Event of Overvoltage (HVRT)......................................................................................... 210
13.6 Cascade Control ..............................................................................................................................................211
13.7 Grid Protection..................................................................................................................................................212
13.8 Low-Voltage Meter ...........................................................................................................................................212
13.9 Zone Monitoring...............................................................................................................................................213
14 Operating Data and Parameters ................................................................................................214
14.1 Operating Data ................................................................................................................................................214
14.1.1 Inverter..............................................................................................................................................................214
14.1.1.1 Power Limitation............................................................................................................................................... 214
14.1.1.2 Error Channels ................................................................................................................................................. 216
14.1.1.3 Measured Values............................................................................................................................................. 217
14.1.1.4 Internal Device Values..................................................................................................................................... 217
14.1.1.5 Internal Meters................................................................................................................................................. 217
14.1.1.6 Service-Relevant Displays................................................................................................................................ 218
14.1.2 Sunny Central String-Monitor Controller ........................................................................................................218
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14.1.2.1 Instantaneous Values....................................................................................................................................... 218
14.1.2.2 Internal Device Values..................................................................................................................................... 218
14.1.2.3 Status Values.................................................................................................................................................... 219
14.1.3 Sunny String-Monitor .......................................................................................................................................219
14.1.3.1 Instantaneous Values....................................................................................................................................... 219
14.1.3.2 Internal Device Values..................................................................................................................................... 219
14.1.3.3 Status Values.................................................................................................................................................... 219
14.1.4 Zone Monitoring ..............................................................................................................................................219
14.1.4.1 Instantaneous Values....................................................................................................................................... 219
14.1.4.2 Status Values.................................................................................................................................................... 220
Table of Contents
14.2 Parameters .......................................................................................................................................................220
14.2.1 Inverter..............................................................................................................................................................220
14.2.1.1 Power Limitation............................................................................................................................................... 220
14.2.1.2 Grid Monitoring and Grid Limits..................................................................................................................... 229
14.2.1.3 Grid Support .................................................................................................................................................... 232
14.2.1.4 Insulation monitoring ....................................................................................................................................... 233
14.2.1.5 Project-Specific Parameters ............................................................................................................................. 233
14.2.2 Sunny Central String-Monitor Controller ........................................................................................................236
14.2.3 Sunny String-Monitor .......................................................................................................................................237
14.2.4 Zone Monitoring ..............................................................................................................................................239
15 Technical Data...............................................................................................................................241
15.1 MV Power Station 500SC-JP ...........................................................................................................................241
15.2 MV Power Station 630SC-JP ...........................................................................................................................242
15.3 MV Power Station 800SC-JP ...........................................................................................................................243
15.4 MV Power Station 1000SC-JP.........................................................................................................................244
15.5 MV Power Station 1250SC-JP.........................................................................................................................246
15.6 MV Power Station 1600SC-JP.........................................................................................................................247
16 Appendix.......................................................................................................................................249
16.1 Scope of Delivery .............................................................................................................................................249
16.2 Storage..............................................................................................................................................................251
16.3 Installation Information.....................................................................................................................................252
16.3.1 Torques .............................................................................................................................................................252
16.3.2 Reduction of DC Input Currents for DC Fuses ................................................................................................252
16.4 XML File custom.xml .........................................................................................................................................253
16.4.1 Structure of the XML File custom.xml...............................................................................................................253
16.4.2 Parameters and Values for the File custom.xml..............................................................................................254
17 Contact...........................................................................................................................................256
System Manual 11MVPS22JP-SH-en-11
1 Information on this Document
SMA Solar Technology AG
1 Information on this Document
1.1 Validity
This document is valid for the following device types of the MVPowerStation with the inverters of the series
SunnyCentral 500CP-JP/ 630CP-JP/ 800CP-JP:
• Medium Voltage Power Station 500SC-JP (MVPS 500SC-JP)
• Medium Voltage Power Station 630SC-JP (MVPS 630SC-JP)
• Medium Voltage Power Station 800SC-JP (MVPS 800SC-JP)
• Medium Voltage Power Station 1000SC-JP (MVPS 1000SC-JP)
• Medium Voltage Power Station 1250SC-JP (MVPS 1250SC-JP)
• Medium Voltage Power Station 1600SC-JP (MVPS 1600SC-JP)
The production version is indicated on the type label.
Illustrations in this document are reduced to the essential and may deviate from the real product.
1.2 Target Group
The tasks described in this document must only be performed by qualified persons. Qualified persons must have the
following skills:
• Knowledge of how the product works and is operated
• Training in how to deal with the dangers and risks associated with installing and using electrical devices and
systems
• Training in the installation and commissioning of electrical devices and systems
• Knowledge of all applicable standards and directives
• Knowledge of and adherence to this manual and all safety precautions
1.3 Additional Information
Links to additional information can be found at www.SMA-Solar.com.
1.4 Symbols
Symbol Explanation
Indicates a hazardous situation which, if not avoided, will result in death or serious injury
Indicates a hazardous situation which, if not avoided, can result in death or serious injury
Indicates a hazardous situation which, if not avoided, can result in minor or moderate injury
Indicates a situation which, if not avoided, can result in property damage
Information that is important for a specific topic or goal, but is not safety-relevant
Indicates a requirement for meeting a specific goal
Desired result
A problem that might occur
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1.5 Typographies
Typographies Use Example
1 Information on this Document
bold
>
[Button/Key]
• Display messages
• Elements on a user interface
• Terminals
• Slots
• Elements to be selected
• Elements to be entered
• Connects several elements to be
selected
• Button or key to be selected or
pressed
• Set parameter WGra to 0.2.
• Select PV system > Detect.
• Select [Start detection].
1.6 Nomenclature
The products installed on the Medium Voltage Power Station, such as the inverter or the MV transformer, are referred
to as "devices".
Complete designation Designation in this document
Medium Voltage Power Station MV Power Station
SunnyCentralCommunicationController SC-COM or communication unit
Medium-voltage transformer MV transformer
System Manual 13MVPS22JP-SH-en-11
2 Safety
SMA Solar Technology AG
2 Safety
2.1 Intended Use
The MVPowerStation is a complete system for PV power plants. All devices required to convert the direct current
generated by the PV modules into alternating current and to feed this current into the medium-voltage grid are located
in the MVPowerStation.
Operation of the MVPowerStation is only permitted providing that the maximum permissible DC input voltage, AC
output voltage and the required ambient conditions are adhered to. The maximum permissible DC input voltage, AC
output voltage and the required ambient conditions are subject to the respective configuration of the
MVPowerStation. Ensure that the ambient conditions and the maximum permissible voltage are complied with prior to
commissioning the MVPowerStation.
It is only permitted to use the product in a PV power plant which is designed as a closed electrical operating area as
per IEC61936-1.
The specified safety clearances must be observed.
Do not deactivate or modify settings that affect grid management services without first obtaining approval from the grid
operator.
The product is designed for outdoor use only.
Use this product only in accordance with the information provided in the enclosed documentation and with the locally
applicable standards and directives. Any other application may cause personal injury or property damage.
Alterations to the product, e.g. changes or modifications, are only permitted with the express written permission of
SMA Solar Technology AG. Unauthorized alterations will void guarantee and warranty claims and in most cases
terminate the operating license. SMA Solar Technology AG shall not be held liable for any damage caused by such
changes.
Any use of the product other than that described in the Intended Use section does not qualify as appropriate.
The enclosed documentation is an integral part of this product. Keep the documentation in a convenient place for
future reference and observe all instructions contained therein.
Only persons fulfilling all of the skills for the target group are permitted to work on or with the product.
All work on the product must only be performed using appropriate tools and in compliance with the ESD protection
regulations.
Suitable personal protective equipment is to be worn by all persons working on or with the product.
Unauthorized persons must not operate the product and must be kept at a safe distance from the product.
The service platforms and the protection roofs for the inverter compartment and transformer compartment must be open
during operation. All other doors and covers must be closed during operation.
The product must not be opened when it is raining or when humidity exceeds 95%.
The product must not be operated with any technical defects.
The type label must remain permanently attached to the product.
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2 Safety
2.2 Safety Information
This section contains safety information that must be observed at all times when working on or with the product. To
prevent personal injury or property damage and to ensure long-term operation of the product, read this section
carefully and observe all safety information at all times.
Danger to life from electric shock due to live voltage
High voltages are present in the live components of the product. Touching live components results in death or serious
injury due to electric shock.
• Wear suitable personal protective equipment for all work on the product.
• Do not touch any live components.
• Observe all warning messages on the product and in the documentation.
• Observe all safety information of the module manufacturer.
• After switching off the inverter, wait at least 15minutes before opening it to allow the capacitors to discharge
completely (see Section7.4, page100).
Danger to life from electric shock due to live DC cables
DC cables connected to PV modules that are exposed to sunlight carry live voltage. Touching live cables results in
death or serious injury due to electric shock.
• Prior to connecting the DC cables, ensure that the DC cables are voltage-free.
• Wear suitable personal protective equipment for all work on the device.
Danger to life from electric shock due to ground fault
If a ground fault has occurred, parts of the PV power plant that are supposedly grounded may in fact be live.
Touching incorrectly grounded parts of the PV power plant results in death or serious injuries from electric shock.
• Before working on the PV power plant, ensure that no ground fault is present.
• Wear suitable personal protective equipment for all work on the device.
Danger to life from electric shock due to damaged product
Operating a damaged product can lead to hazardous situations that result in death or serious injuries due to electric
shock.
• Only operate the product when it is in a flawless technical condition and safe to operate.
• Check the product regularly for visible damage.
• Make sure that all external safety equipment is freely accessible at all times.
• Make sure that all safety equipment is in good working order.
• Wear suitable personal protective equipment for all work on the product.
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2 Safety
Danger to life from electric shock even if the inverter is disconnected on the AC and DC sides
The precharge unit of the order option "QatNight" will carry live voltage even if the AC contactor and the DC
switchgear are open. Touching live components results in death or serious injury due to electric shock.
• Do not touch any live components.
• Switch off the inverter.
• After switching off the inverter, wait at least 15minutes before opening it to allow the capacitors to discharge
completely.
• Ensure that no voltage is present.
• Do not remove protective covers.
• Observe the warning messages.
• Wear suitable personal protective equipment for all work on the product.
Danger to life from electric shock from improperly operating the tap changer of the MV transformer.
SMA Solar Technology AG
Operating the tap changer of the MV transformer while energized will create a short circuit in the MV transformer.
The resulting voltages will lead to death or serious injury.
• Only operate the tap changer when the MV transformer is dead.
• Ensure the MV transformer is dead before performing any work or making any adjustments.
• All work and adjustments on the MV transformer must be performed by a duly authorized person.
• Wear suitable protective equipment for all work.
Danger to life from electric shock if the product is not locked
If the product is not locked, unauthorized persons will have access to live components carrying lethal voltages.
Touching live components can result in death or serious injury due to electric shock.
• Always close and lock the product.
• Remove the keys.
• Store the keys in a safe place.
• Ensure that no unauthorized persons have access to the closed electrical operating area.
Risk of fire due to failure to observe torque specifications on live bolted connections
Failure to follow the specified torques reduces the ampacity of live bolted connections so that the contact resistances
increase. This can cause components to overheat and catch fire.
• Ensure that live bolted connections are always tightened with the exact torque specified in this document.
• When working on the device, use suitable tools only.
• Avoid repeated tightening of live bolted connections as this may result in inadmissibly high torques.
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Danger to life from electric shock when entering the PV field
Ground-fault monitoring does not provide protection from personal injury. PV modules which are grounded with
ground-fault monitoring discharge voltage to ground. Entering the PV field can result in lethal electric shocks.
• Ensure that the insulation resistance of the PV field exceeds the minimum value. The minimum value of the
insulation resistance is: 1 kΩ.
• Before entering the PV field, switch the PV modules to insulated operation.
• Configure the PV power plant as a closed electrical operating area.
Danger to life due to arc fault caused by fault in the medium-voltage switchgear
If there is a fault in the medium-voltage switchgear, arc faults may occur during operation of the product which can
result in death or serious injuries. If arc faults occur in the medium-voltage switchgear, the pressure evacuates under
the compartment of the medium-voltage switchgear.
• Only perform work on the medium-voltage switchgear when it is in a voltage-free state.
• Only perform switching operations on the medium-voltage switchgear from the service platform.
2 Safety
• Do not touch or access the roof of the medium-voltage switchgear when medium voltage is connected.
• When switching operations are performed, all persons that are not on the service platform have to keep a safe
distance from the product.
• All work and switching operations on the medium-voltage switchgear must only be performed by qualified
persons wearing adequate personal protective equipment.
Risk of burns due to hot components
Some components of the product can get very hot during operation. Touching these components can cause burns.
• Observe the warnings on all components.
• During operation, do not touch any components marked with such warnings.
• After switching off the product, wait until any hot components have cooled down sufficiently.
• Wear suitable personal protective equipment for all work on the product.
Danger of falling from service platforms
Icy, moist or sand-covered service platforms may be slippery. Service personnel can be injured by slipping or falling
from service platforms.
• Wear suitable personal protective equipment for all work on the product.
• Before stepping onto the service platform, ensure that there is no layer of snow, ice, sand or moisture on the
platform.
• Do not keep any objects near or on the service platforms.
System Manual 17MVPS22JP-SH-en-11
2 Safety
Risk of injury from collapse of roof and protection roofs under excessive snow load
If the maximum permissible snow load is exceeded, the roof and the protection roofs of the product may collapse or
snap. As a result, persons can be injured by falling metal parts.
• Prior to entering the service platforms, ensure that the snow load on the roof and protection roofs is not
exceeded. The maximum permissible snow load is: 2,500N/m2.
• Keep roof and protection roofs free of snow.
• Wear suitable personal protective equipment for all work on the product.
Damage to the devices due to sand, dust or moisture penetration
Sand, dust or moisture penetration can damage the devices of the MVPowerStation or impair their functionality.
• Do not open any devices during a sandstorm, precipitation or when humidity exceeds 95%.
• Only perform maintenance work when the environment is dry and free of dust.
• If the installation, maintenance or commissioning process is interrupted, mount all enclosure parts and close all
doors.
SMA Solar Technology AG
Damage to electronic components due to electrostatic discharge
Electrostatic discharge can damage or destroy electronic components.
• Observe the ESD safety regulations when working on the product.
• Wear suitable personal protective equipment for all work on the product.
• Discharge electrostatic charge by touching grounded enclosure parts or other grounded elements. Only then is
it safe to touch electronic components.
Damage to oil tray due to ice formation
In subfreezing conditions, water in the oil tray may freeze and damage the oil tray.
• Check the oil tray regularly for water. Remove water, if necessary.
2.3 Personal Protective Equipment
Always wear suitable protective equipment
When working on the product, always wear the appropriate personal protective equipment for the specific job.
The following personal protective equipment is regarded to be the minimum requirement:
☐ In a dry environment, safety shoes of categoryS3 with perforation-proof soles and steel toe caps
☐ During precipitation or on moist ground, safety boots of categoryS5 with perforation-proof soles and steel toe
caps
☐ Tight-fitting work clothes made of 100%cotton
☐ Suitable work pants
☐ Individually fitted hearing protection
☐ Safety gloves
Any other prescribed protective equipment must also be used.
System ManualMVPS22JP-SH-en-1118
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3 Product Overview
3 Product Overview
3.1 System Overview
The MVPowerStation is a complete solution for PV power plants. All devices required to convert the direct current
generated by the PV modules into alternating current and to feed this current into the medium-voltage grid are located
in the MVPowerStation. The MVPowerStation is based on a modular concept in which you can select the devices
according to the specific project requirements. The MVPowerStation may contain one or two inverters.
Figure 1: Design of the PV power plant with MVPowerStation (example)
3.2 Design of the MVPowerStation
Figure 2: Design of the MVPowerStation
Position Designation Explanation
A Protective roof The roof protects the devices from direct solar irradiation.
B Service platform The elevated position of the service platform facilitates opera-
tion of the devices and is part of the cooling concept of the
MVPowerStation.
System Manual 19MVPS22JP-SH-en-11
3 Product Overview
Position Designation Explanation
C MV transformer The MV transformer converts the inverter output voltage to the
voltage level of the medium-voltage grid.
D Medium-voltage switchgear* The medium-voltage switchgear disconnects the MV trans-
former from the medium-voltage grid.
SMA Solar Technology AG
E Communit*
or
Control device for cascade control*
F Transformer for internal power supply* The transformer for internal power supply provides the supply
G Station subdistribution The station subdistribution contains fuse and switching elements
H Sunny Central CP-JP The SunnyCentral is a PV inverter that converts the direct cur-
* optional
The Communit contains control and communication devices.
The order option "Cascade control" allows for staggered recon-
nection of several medium-voltage switchgears after a grid failure or maintenance work.
voltage for the MVPowerStation and its devices. It is connected to the low-voltage side of the MV transformer (see circuit diagram).
for the supply voltage.
rent generated in the PV arrays into grid-compliant alternating
current.
3.3 Design of the inverter
Figure 3: Design of the Inverter
Position Designation
A Inverter cabinet
B Interface cabinet
C Connection area
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3 Product Overview
3.4 Devices of the Inverter
Figure 4: Devices of the inverter
Position Device Description
A Touch Display Different kinds of inverter data can be viewed on the touch display. The
touch display is only used to view data. The display screen is activated by
touching the touch display.
B Service interface The service interface allows access to the user interface.
C Key switch The key switch is used to switch the inverter on and off.
D DC switchgear The DC switchgear disconnects the inverter from the PV array.
E SC-COM The SC-COM is the communication unit of the inverter. The SC-COM estab-
lishes the connection between the inverter and the system operator.
F AC disconnection unit With the AC disconnection unit, the electrical connection between the in-
verter and MV transformer can be disconnected manually.
In the event of residual current, the AC disconnection unit disconnects the
connection between the inverter and MV transformer automatically.
G AC contactor The AC contactor disconnects the electrical connection between the in-
verter and MV transformer automatically.
System Manual 21MVPS22JP-SH-en-11
A
H
F
E
D
G
B
C
3 Product Overview
3.5 Devices of the MV Transformer
The MV transformer is the link between the inverters and the medium-voltage grid.
Figure 5: Devices of the MV transformer
Position Device Description
SMA Solar Technology AG
A Contact thermometer or hermetic
protection*
B Tap changer The tap changer makes it possible to adjust the transmis-
* optional
Temperature control unit or hermetic full-protection device
of the MV transformer
sion ratio of the MV transformer.
3.6 Devices of the Medium-Voltage Compartment
Figure 6: Devices of the medium-voltage compartment (example)
Position Designation
A Fans*
B Medium-voltage switchgear
C Spatial separation between medium-voltage switchgear and low-voltage devices**
D Low-voltage transformer
E Circuit breaker for low-voltage transformers
F Outlet
System ManualMVPS22JP-SH-en-1122
A
B
C
36kV
C
B
A
24kV
SMA Solar Technology AG
3 Product Overview
Position Designation
G Station subdistribution
H Communit or control device***
* for order option "Ambient temperature up to +50°C/+55°C"
** for order option "spatial separation"
*** for order option "Cascade control"
3.7 Devices of the Medium-Voltage Switchgear
The medium-voltage switchgear is used to disconnect the MVPowerStation from the medium-voltage grid. For the
order option "Cascade control", the middle cable panel is additionally equipped with a motor drive.
Figure 7: Devices of the medium-voltage switchgear (using the examples of a 24kV switchgear and a 36kV switchgear)
Position Designation
A Outer cable panel with load-break switch
B Center cable panel with load-break switch, in option "Cascade control" motor-driven and
equipped with auxiliary contacts on the voltage display system
C Transformer panel with circuit breaker and disconnect switch
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3.8 Devices of the Station Subdistribution
The station subdistribution is located in the compartment of the medium-voltage switchgear and contains the circuit
breakers of the supply voltages and the optional devices. Depending on the order option of the MVPowerStation, the
number of lines and components is different in the station subdistribution.
Figure 8: Optional devices of the station subdistribution (example)
Position Designation
A Low-Voltage Meter
B Voltage and frequency monitoring relay for order option "Grid protection"
3.9 Devices of the Communit
The Communit is a central communication distribution unit in a large-scale PV power plant and incorporates
communication devices.
Figure 9: Devices of the Communit (example)
Position Designation
A Customer installation location
B SunnyWebBox
C SMAClusterController
D Patch panel
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Position Designation
E Router
F Ethernet I/O
G Network2
H Network1
3 Product Overview
3.10 Oil Tray
The oil tray collects oil which can leak from the transformer under fault conditions. The oil separators integrated in the
oil tray prevent the collected oil from leaking out of the oil tray in case the oil tray is full of rain water. The rain water is
heavier than the oil and runs through the oil separator whereas the oil remains in the oil tray.
An oil drain valve must be mounted at the oil tray in order to remove oil that has leaked into the oil tray. In order to
facilitate maintenance work, an inspection shaft must be planned at the oil drain valve.
The oil tray must be secured against floating away.
Figure 10: Positon of the oil tray
Designation
A Oil tray
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3.11 Transformer for Internal Power Supply
The transformer for internal power supply provides supply voltage for the inverters, Communit, lighting and outlet (see
circuit diagram of the MVPowerStation).
Figure 11: Position of the transformer for internal power supply
Position Designation
A Transformer for internal power supply
3.12 Circuitry Principle of the MVPowerStation
Figure 12: Circuitry principle of the MVPowerStation (example)
Position Designation
A DC Input
B Inverter
C MV transformer
D Circuit breaker for low-voltage transformers
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Position Designation
E Medium-voltage switchgear*
F AC Output
G Low-voltage transformer*
H Station subdistribution
I External communication terminal
K Communit*
* optional
3.13 Operating and Display Elements
3.13.1 Switch in the Inverter
3.13.1.1 Key Switch
3 Product Overview
The key switch is used to switch the inverter on and off.
Figure 13: Switch positions of the key switch
Position Designation
A
B
Switch position Stop
Switch position Start
Switch position Start
If the key switch is turned to Start, a motor drive switches the DC switchgear on and the inverter switches from the
operating state "Stop" to the operating state "Grid monitoring". Provided that there is sufficient irradiation and a valid
utility grid connection, the inverter switches to feed-in operation. If there is insufficient irradiation and the input voltage
is therefore too low, the inverter remains in the operating state "Grid monitoring".
Switch position Stop
If the key switch is turned to Stop while the inverter is in the operating state "Grid monitoring", a motor drive switches
the DC switchgear off. The inverter switches to the operating state "Stop". If the key switch is turned to Stop while the
inverter is in the operating state "MPP load operation", the inverter switches to the operating state "Shutdown". Once
shutdown is complete, the AC contactor and the DC switchgear are opened automatically and the inverter switches to
the operating state "Stop".
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3 Product Overview
3.13.1.2 AC Disconnection Unit
The AC disconnection unit disconnects the inverter from the MV transformer.
Figure 14: Switch positions of the AC disconnection unit from ABB
SMA Solar Technology AG
Position Designation Explanation
A
B Central switch position The AC disconnection unit was tripped and is open.
C
Switch position on
Switch position off
The AC disconnection unit is closed.
The AC disconnection unit is open.
3.13.1.3 DC Switchgear
The DC switchgear disconnects the inverter from the PV power plant.
Figure 15: Indicators on the DC load-break switch
Position Designation
A Spring status indicator
B Position indicator
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Position Designation
C ON button
D OFF button
3.13.2 Switch in the Station Subdistribution
Reference designations are attached to the individual devices of the station subdistribution.
Figure 16: Circuit breaker in the station subdistribution (example)
3 Product Overview
Position Designation
A Circuit breaker for fans with order option "Ambient temperature up to +50°C/+55°C"
B Circuit breaker of the supply voltage of inverter1
C Circuit breaker of the supply voltage of inverter2
D Circuit breaker of the contact thermometer or hermetic protection*
E Residual-current device and circuit breaker of the outlet
F Circuit breaker of the Communit and lighting
G Main switch of the supply voltage of the MVPowerStation
* optional
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3.13.3 Switch on the Medium-Voltage Switchgear
Figure 17: Control panels of the medium-voltage switchgear with circuit breaker in the transformer panel (example)
Position Designation
A Grounding switch of the cable panel
B Load-break switch of the cable panel
C Three-position switch with the following switch positions: ON / OFF / GROUNDED
D Circuit breaker of the transformer panel
3.13.4 Switch on the Control Device for Cascade Control
For the order option "Cascade control", a control device for the medium-voltage switchgear is integrated in the
medium-voltage compartment. The control device enables the automatic reconnection of several medium-voltage
switchgears (see Section13.6 "Cascade Control", page211).
Figure 18: Switch and devices of the control device for order option "Cascade control"
Position Designation
A Network port
System ManualMVPS22JP-SH-en-1130
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