Disturbance De-coupling for Faults Detection and Identification Based on Right Eigenvectors Assignment for a Single-phase PWM Rectifier

【摘要】：In this paper, an easy and robust strategy against the uncertainties is proposed to detect and isolate temporary faults in the IGBTs of a single-phase PWM rectifier. It deals with uncertainties which affect the control input signal. Eigen structure assignment(EA) is used to generate a residual de-coupled from disturbance. With this new application, robust observer algorithm based on right eigenvectors is implemented. Open-circuit faults are considered for this preliminary study. Simulation results are presented to illustrate the robustness of the proposed fault detection and identification method.