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有源电力滤波器可动态补偿电网中的谐波和无功分量。在分析整流桥直流侧并联型有源电力滤波器的基础上,提出了三相整流桥直流侧串联型有源电力滤器的基本拓扑结构,建立了基于双环控制的数学模型,并从理论上证明了基本结构和控制模型的正确性。对补偿前后三相电源电流进行了仿真研究,结果表明补偿后各相总谐波畸变率大大降低,电源电流为与电源电压同频同相的正弦波,很好地证明了该新型有源电力滤波器良好的补偿效果。
Active power filters can dynamically compensate for harmonic and reactive components in the grid. Based on the analysis of DC-side shunt active power filter of rectifier bridge, the basic topology of DC-side series active power filter of three-phase rectifier bridge is proposed and a mathematical model based on double loop control is established. It is theoretically proved The correctness of the basic structure and control model. The simulation results show that the total harmonic distortion rate of each phase is greatly reduced after the compensation, and the supply current is a sine wave with the same frequency and same phase with the supply voltage, which proves well that the new active power filter Good compensation effect.