Impact of Network Side Converter Reference Frame Selection on Wind Turbine Operation under Asymmetrical Grid Voltage

摘要

This paper studies the impact of network voltage asymmetry on the operation of full-power converter wind turbine with different network side converter (NSC) control methods.The aim of the study is to investigate the impact of NSC reference frame selection on quality of generated power.The studied reference frames are oriented to converter voltage and network voltage.It is shown that network voltage asymmetry has great operational impact if control system of NSC is oriented to the converter voltage.This may lead to power quality problems especially when wind turbines are connected to weak networks.