摘要：The widespread use of single phase bidirectional converters in different applications is a real
motivation to more and more interest to their monitoring and fault diagnosis. Generally, the
conventional control loop of a single phase PWM converter uses both voltage and current
sensors. Hence in case of sensor fault, the performances and the availability of the converter
can be seriously compromised. This paper proposes a fast and robust sensor fault detection and
isolation (FDI) and fault tolerant control (FTC) of a single phase PWM rectifier. The proposed
FDI approach is based on residual generation. In order to improve the robustness of the
proposed FDI algorithm and avoid false alarms, adaptive thresholds are used. Each residual
remains under its threshold and crosses it if and only if the corresponding sensor is in fault
state. Thus the faulty sensor can be easily distinguished and the uniqueness of signature of each
faulty sensor is guaranteed. The control reconfiguration algorithm maintains the performances
of the converter during post fault operating mode. The proposed method performances are
analyzed by means of several simulations and experimental results.
关键词：single phase PWM rectifier; sensor fault; residual generation; state observer; adaptive;
threshold; control reconfiguration.
