Fault-tolerant efficient control of six-phase induction generators in wind energy conversion systems with series-parallel machine-side converters

摘要

This work discusses the implementation of an efficient fault-tolerant control m a multiphase wind energy conversion system. The conversion system consists of an asymmetrical six-phase induction generator supplied by four voltage source converters (VSCs) m a hybrid series/parallel configuration. Post-fault operation must preserve the current ratings of the system and should also maximize the generated power by means of a proper flux adjustment. Both requirements are achieved m this work using a non-linear optimization analysis and some modifications m the control scheme. Simulation results confirm the optimal and safe performance of the wind energy system under study.