Hybridization
– perfectly balancing supply
and demand to meet
carbon goals
POWER
Exactly when
you need it
www.danfossdrives.com
Clean energy
revolution transforms
supply comprises a mix of traditional
and renewable power sources, often
including battery storage.
The benefits of hybridization, in this
instance, are fuel savings, performance
improvements and reduced emissions.
performance
Decarbonization is under increasingly urgent global focus as climate change research
and experience increasingly impact societies around the globe. As a result, we develop
the means and measures required to guide the international community towards cleaner
energy sources such as the international Sustainable Development Goals, the Paris
agreement, and International Maritime Organization regulations
The world is steadily, and quite quickly, diversifying its primary sources of energy. As we
transition from fossil fuels such as oil and coal, through natural gases and nuclear power
and further toward solar, wind and hydro, there’s an increasing need to overcome the gaps
produced when the energy demand exceeds energy supply - or when energy supply
exceeds demand.
Energy providers attempt to meet the
ever-changing supply and demand
requirements as closely as possible.
However, external factors, such as
the weather (in relation to renewable
sources of power) and the needs of
industrial customers (with inherent
changes in peak demands), make the
balance of energy supply and demand
quite challenging. This is where
hybridization comes into play.
Hybridization at a glance
A simple and broad
definition of
hybridization is any
system with two
or more sources of
energy acting together to accomplish
a task. A hybrid power supply system
could include a combination of
multiple energy sources, for example
solar power, batteries, and LNG. One
of the most commonly recognized
forms of hybridization today is the
distributed grid, where the mains power
In the world according to Danfoss
Drives, the definition of hybridization
can be summed up by introducing a
means of energy storage into a system.
Hybrid solutions are implemented
primarily for at least one of these
reasons:
Opportunity to sell more energy from
renewable sources to the grid
Reduce total cost of operation (TCO)
over the lifetime of the system by:
- avoiding over-dimensioning a system
- deferring investment in infrastructure
In over-supply situations, the hybrid
system can store the surplus energy.
When demand levels are high,
the stored energy can then be used
again to provide an additional source
of energy
Reduce operating expenses (OPEX)
- improve system efficiency
- increase system availability
Hybrid systems can increase system
efficiency and avoid power outages
caused by grid instability;
Decrease downtime of the system
by increasing robustness in the
case of power-quality issues.
Hybrid
configurations
The illustration
shows how some of
these systems can
be arranged. The size
and layout of each
hybrid system varies
greatly depending
on the application.
Multiple sources
can supply energy
to the application,
for example mains
supply, local
renewable energy
source, and energy
storage in the form
of batteries, super
caps or other form
of energy storage.
2
Energy storage directly connected to the AC grid using
a grid converter
This reduces the component count and size of the system and improves efficiency.
Danfoss Drives products for hybridization can
be utilized in many applications
Hybrid lifts efficiency ambitions
Energy storage is a prerequisite for
integrating renewable energy into
power generation. However, Danfoss is
widening the scope of energy storage
and developing solutions that also
focus on the optimization of energy
consumption. By equipping residential
and industrial consumers, as well as
renewable energy sources with
energy storage systems, it is possible to
significantly improve power quality and
upgrade performance and overall
efficiency.
Key benefits of energy
storage
Energy storage provides greater stability
in power production systems by
providing peak shaving to the incoming
power, time shifting for production and
back-up power in emergency situations.
LVDC
Feeder Station
LVDC
Maximum Power
Point Tracking
LVDC
Substation
Battery
Management
LVDC
Substation
Substation
LVDC
Electric Vehicle
Charging
LVDC
Substation
Challenge Benefit
Integration of renewable energy sources • Energy production forecasting
Grid stability – ancillary services • Frequency regulation/inertia emulation
µGrids • Peak power compensation on a substation-level
Efficiency • Energy production optimization in co-operation
Ecology • Clean energy in harbors
Availability of electrical power • Uninterrupted power supply to, for example,
Land construction and mining • Local energy production, typically diesel gensets,
• Peak shaving
• Time shifting of production
• Spinning reserves
• Overload ability/boosting
• Fast starting/reacting
• Back-up power in disturbance situations
with diesel and LNG generators
• Consumption optimization of loads in marine
environment
• Avoid transmission losses
• Time shifting, integration of renewable power supplies
telecommunications, airports and hospitals
operation optimization with batteries
• Machine hybridization
DC/DC converter connected between the DC link and the energy storage
This brings the load power/energy support close to the consumption, provides different storage
voltage/technology adaptations, increases expandability and enables the battery stack to be replaced
as needed.
M
3
Peak shaving
Peak shaving involves optimizing the energy flow between the incoming supply and local storage to meet spikes in
demand. Excess energy can be stored when demand and costs are low.
Time shifting
Time shifting involves storing energy during times when energy costs from the grid are low, and supplying energy from
the storage medium when energy costs from the grid are high
Back-up power
Energy storage can be used to provide back-up power during outages maintaining the ability to operate for a period of
time.
Hybrid system utilization is expected to
continue to increase significantly across
a wide cross section of land- and seabased industry and commercial sectors,
especially due to the reduction of battery
costs and the drive to decarbonization.
As well as these financial incentives,
intensifying regulation to enforce
decarbonization means hybrid solutions
are more relevant today than ever before.
Energy storage in wind and
solar applications
Traditional energy production with
ancillary services
Grid support
Marine and Offshore industry
Harbors
Machinery-level energy storage
Land construction and mining
Remote locations
Read more about sustainable power
networks here.
Features and benefits of the Danfoss hybrid solutions
Feature Benefit
One-stop power conversion shop Reduce procurement costs – Air- and liquid-cooled
drives, AFE, NFE, DC/DC, Grid Converter, DC Modules
and components are available from one source
Wide power range Reduce variants – solutions are available for applications
in a kW to MW range
Modular solution Based on the VACON® NXP platform power modules,
the DC bus system can be easily configured
Wide voltage range Increase flexibility – Ability to integrate a wide variety
of common battery bank voltages using a DC/DC
converter
Flexibility Easy to upgrade – The simple-to-extend VACON® NXP
platform provides great system flexibility with a low
additional investment
Scalability Solutions can be scaled up to meet future energy
requirements in terms of new energy sources, additional
storage or to meet increasing demand
Serviceability Lower investments – Utilizing the same VACON® NXP
hardware configurations, service teams require little to
no additional training
Industry and application knowledge Made to last – Liquid- and air-cooled solutions based
on in-depth application knowledge for the most
demanding industries
Open approach Faster Go-To-Market – Wide range of applications made
available as foundation for building tailored solutions
Partnership Stronger together – System integrators collaborate with
a vendor who has a vested interest in their success
DKDD.PFM.406.A2.22 © Copyright Danfoss Drives | 2019.11
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