POWER QUALITY BEHAVIOUR OF LARGE WIND PARKS WITH VARIABLE SPEED WIND ENERGY CONVERTER

The contribution deals with the description of and measurement results from a section of one of Europe’s biggest wind parks in Germany, 150 km northern of Berlin. Power quality properties of wind energy converters (WECs) with 1.5 MW and 1.8 MW nominal power were investigated. Different generator types and manufacturer types were measured. Two main generator concepts for variable-speed WECs will be compared, the double-fed asynchronous generator and the inverter coupled synchronous generator. Measurement results of the harmonics and interharmonics, voltage deviation shapes and flicker of different voltage levels will be presented. Based on these results the damping effect of the transformer can be concluded.