Fraunhofer Institute for Wind Energy Systems (Fraunhofer IWES) has launched
a mobile test facility for grid compliance tests research project, also
known as “Mobil-Grid-CoP” in German. It is being launched with the aim
of developing and commissioning a mobile grid simulator.
The grid simulator will serve to verify current and future grid system
services as well as electrical properties of a wind turbine. It is designed
to allow the testing and optimisation of the grid compatibility of very
large wind turbines with an output of up to 20 MW. The Federal Ministry
for Economic Affairs and Energy (BMWi) is financing this research project
to the tune of € 12.7 million.
Test benches are currently available for accelerated testing of the electrical
properties of wind turbines, enabling realistic testing under reproducible
conditions in a defined time frame. However, future turbine sizes, especially
offshore, demand an output in excess of 15 MW, which cannot be provided
by today’s test benches according to Fraunhofer IWES. The project will
run for three years with commissioning planned for fall 2022.
In the future, the new mobile grid simulator will be able to simulate various
grid connection points and dynamic grid events for this testing prototypes
directly in the field. In addition to grid errors, the mobile test facility
to be developed will also allow testing of dynamic frequency changes to
analyze the supply of active power from the turbine and examine the effects
thereof on the overall system. It will also be possible to simulate future
requirements such as blackouts in order to test the grid restoration capacity
of power grids.
“In Mobil-Grid-CoP, Fraunhofer IWES is developing the world’s largest
grid simulator with an output of 80 MVA. For one thing, this can be integrated
seamlessly into our existing DyNaLab (Dynamic Nacelle Testing Laboratory)
test structure and, for another, it can be used in the open field. Furthermore,
it will also be able to be connected to the planned hydrogen test field,”
summarised Prof. Jan Wenske, Deputy Head of the Institute and Technical
Director of Fraunhofer IWES.
“The mobile grid simulator will be connected directly to the grid connection
point at a test site. The 80 MVA grid simulator enables the testing of
objects up to an output of 20 MW, meaning that even entire wind farms and
strings can be measured. Furthermore, active disturbance analysis during
operation on the grid is possible”, added Gesa Quistorf, project manager
at Fraunhofer IWES.
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