容错型并联有源电力滤波器控制方法

摘要

为提高并联型有源电力滤波器的工作可靠性,提出了一种故障容错方法.当并联型有源电力滤波器中的某个电力电子器件发生故障时,利用剩余的非故障电力电子器件组成三相四开关逆变器,替代原三相六开关逆变器,可以保证其在故障状态下能继续工作,为消除故障赢得时间.同时还并给出故障状态下的三相四开关逆变器电压矢量合成方法.仿真和实验结果证明了该容错方法的有效性.%A fault-tolerant method is proposed to improve the operation reliability of shunt active power filter(SAPF). When one power electronic device in the SAPF system is damaged,a three-phase four-switch inverter consisting of the rest normal devices will be used to replace the original three-phase six-switch inverter. In this way,the SAPF system can be guaranteed to continue work even in a fault state,which earns time for the personnel to eliminate the fault. More?over,the formation method for the voltage vectors of three-phase four-switch inverter under fault is also given. The effec?tiveness of the proposed method is demonstrated by simulation and experimental results.