The control of power electronic converters for grid code compliance in wind energy generation systems
This research report reviews some of the latest control schemes for the power electronic converters found in modern variable speed wind turbines in order to comply with various grid codes. Various control schemes, in order to comply with low voltage ride-through requirements, active and reactive...
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| Format: | Others |
| Language: | en |
| Published: |
2015
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| Online Access: | http://hdl.handle.net/10539/18631 |
| Summary: | This research report reviews some of the latest control schemes for the power
electronic converters found in modern variable speed wind turbines in order to
comply with various grid codes. Various control schemes, in order to comply with
low voltage ride-through requirements, active and reactive power control and
frequency control, are presented. The report first investigates the South African
grid code requirements for wind energy generation, and then makes a comparison
to grid codes of countries with significant penetration levels and vast experience
in wind energy generation. This is followed by a review of the state of the art in
fixed and variable speed wind turbine technologies. The research revealed that
Type 3 generators offer significant advantages over others but suffer due to grid
faults. Various active control schemes for fault ride-through were researched and
the method of increasing the rotor speed to accommodate the power imbalance
was found to be the most popular. It was found that Type 4 generators offer the
best fault ride-through capabilities due to their full scale converters. The research
will assist power system operators to develop appropriate and effective grid codes
to enable a stable and reliable power system. The research will also provide
turbine manufacturers and independent power producers with a comprehensive
view on grid codes and relate them to the associated turbine technologies. |
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