串联型有源电力滤波器的双闭环控制策略

针对轻载条件下串联型有源电力滤波器的补偿要求，分析了前馈控制策略的不足之处。提出了一种双闭环控制策略，这种控制策略控制下的有源电力滤波器具有对负载的适应性好，抗干扰能力强的优点，且内环电流反馈能够明显改善滤波器的补偿特性。仿真结果验证了双闭环控制策略优良的控制及补偿特性。

The Two Closed Loops Control Strategy in Series Active Power Filter

In view of compensation requirement of series active power filter in the condition of low ripples, it analyzes the shortage of front feedback controll strategy and puts forward a strategy of two closed loops ontroll. The two closed loops control strategy is a new-style control strategy in series active power filter. By detecting the instantaneous voltage and the instantaneous current across the passive power filter as the reference signal of the active power filter, the compensation performance of the series active power filter is very obvious, also has nicer adaptability of load and anti-jamming. The experimental emulator in matlab verifies the compensation performance of the series active power filter.