Wels, September 07th 2021
MEDIUM VOLTAGE REQUIREMENTS JORDAN
Fronius International GmbH
confirms that the following inverters
/ Fronius Symo 10.0-3 – 20.0-3
/ Fronius Eco 25.0-3 – 27.0-3
/ Fronius Tauro Eco
fulfill the inverter-specific requirements of the document “Intermittent Renewable Resources (Wind and PV)
Distribution Connection Code (DCC) At Medium Voltage (MV); (IRR-DCC-MV; Version 1; May 24, 2015)”.
In order to fulfill all requirements of “Intermittent Renewable Resources (Wind and PV) Distribution Connection
Code (DCC) At Medium Voltage (MV); (IRR-DCC-MV; Version 1; May 24, 2015)”, a PV-system connected to
the MV-grid will need additional technical equipment.
For more information, the following table shows a detailed analysis of the compliance of the above mentioned
inverters with requirements for the connection to medium voltage in Jordan defined in the document
“Intermittent Renewable Resources (Wind and PV) Distribution Connection Code (DCC) At Medium Voltage
(MV); (IRR-DCC-MV; Version 1; May 24, 2015)”.
Code Description
Frequency Tolerance requirement IRR-DCC-MV 4.1 Complies if configured correctly
Frequency Relaying Requirement IRR-DCC-MV 4.2 Not applicable, requirement at PCC.
Active Power Requirement IRR-DCC-MV 4.3 Complies
Governor – Primary Frequency
Response (PFR)
Voltage Tolerance Requirement
at PCC
Voltage Relaying Requirement IRR-DCC-MV 5.2 Not applicable, requirement at PCC.
Voltage Step Limit IRR-DCC-MV 5.3.1 Evaluation of voltage flicker at PCC are not
Flicker Standards IRR-DCC-MV 5.3.2 Fronius inverters comply with Flicker
Fault and Zero Voltage Ride
through Requirement
Section
Compliance
(Inverter fulfills G99)
IRR-DCC-MV 4.4 Integrated control complies with
requirement of Fig 4-2 if configured
correctly. For compliance of all options
external park control is necessary.
IRR-DCC-MV 5.1 Inverter complies if configured correctly.
Trip limits are defined for a protection at
PCC, so not applicable for inverter.
(Inverter fulfills G99)
done (cannot be done) by Fronius.
standards IEC 61000-3-3 resp. IEC 610003-11. The assessment of the flicker values
at the MV level is not provided by Fronius.
IRR-DCC-MV 5.4 Complies with ride through time profile
according Figure 5-1. During the fault the
inverter provides active power in
proportion to retained voltage. Reactive
current supply can be configured as well. In
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that case, reactive current is promised over
active current.
Voltage Regulation (AVR) IRR-DCC-MV 5.5 Volt/Var control at inverter terminals is
integrated. Other kind of voltage regulation
can be implemented with external park
controller
Reactive Power Requirement IRR-DCC-MV 5.6 Complies if correctly configured.
Power Transformer IRR-DCC-MV 5.7 No inverter topic.
Power Factor IRR-DCC-MV 6 Inverter complies with power factor control
at inverter terminals. For exact control at
PCC, external park controller is required.
Harmonics IRR-DCC-MV 7 Fronius inverter comply with IEC 61000-3-
2 resp. 61000-3-12. The assessment of
voltage harmonics at PCC level is not
delivered by Fronius. Values for harmonics
and interharmonics can be supplied by
request.
Phase Imbalance and Negative
Sequence Handling
IRR-DCC-MV 8 Fronius inverters are configured to deliver
pure symmetrical current with no negative
sequence current.
Ramp Rate IRR-DCC-MV 9 Ramp Rates for startup and control
commands are implemented. Ramp rates
for normal operation are planned to be
implemented. (Ramp Up Limitation
x%/sec.)
Islanding Requirements IRR-DCC-MV 10.1 Active Anti-Islanding is implemented
Passive Anti-Islanding is implemented
Anti Islanding Relay or Transfer
Scheme
IRR-DCC-MV 10.2 Requirements at PCC are out of scope of
the inverter. But RoCoF protection is
implemented in the inverter as well.
System Impact Studies IRR-DCC-MV 11 Impact study is not provided by Fronius.
Fronius International GmbH
Business Unit Solar Energy
Froniusplatz 1
A-4600 Wels
Bernhard Kossak, MSc
Head of Systems Technology
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