Reliability analysis of Fault Tolerant Wind Energy Conversion System with Doubly Fed Induction Generator

This paper presents a fault tolerant converter topology for grid connected Wind Energy Conversion System (WECS) with Doubly Fed Induction Generator (DFIG). This topology allows fault detection and hardware compensation of one of the semiconductors or drivers by using isolating and connecting devices. It is based on a unique redundant leg for both back to back converters. The reliability analysis integrating the semiconductor switching is presented with a efficient modelling method based on Markov Chain model. Application results are presented on the WECS.