提出了一种单相并联混合型有源电力滤波器电路结构。该电路由有源滤波器与基波串联谐振支路并联再与无源滤波电路串联构成,用于抑制非线性整流负载产生的谐波电流流入电源侧。在该电路中,无源滤波器分担大部分抑制谐波和无功补偿的任务,减少了有源滤波器的容量;有源电力滤波器用于改善无源滤波器的滤波效果和抑制它与系统阻抗可能发生的谐振。理论分析和实验结果表明,该混合型有源滤波器充分发挥了无源滤波器和有源滤波器各自的优点,改善了无源滤波器的滤波性能,同时使有源滤波器不再承受基波电压,因此最大限度地减少了有源滤波器的容量,从而使有源电力滤波器能够应用于大功率场合。 Proposed a single-phase parallel hybrid active power filter circuit structure. The circuit consists of an active filter in series with the fundamental series resonant branch and then in series with the passive filter circuit to suppress the harmonic currents generated by the nonlinear rectifying load from flowing into the power supply side. In this circuit, the passive filter to share most of the harmonic suppression and reactive power compensation tasks, reducing the active filter capacity; active power filter is used to improve the filtering effect of passive filters and inhibit it with the system Resonance that impedance may occur. The theoretical analysis and experimental results show that the hybrid active power filter can give full play to the advantages of the passive power filter and the active power filter and improve the filtering performance of the passive power filter, Wave voltage, thus minimizing the active filter capacity, so that the active power filter can be applied to high-power applications.