并联型有源电力滤波器输出电感选择的新方法

A New Method of Output Inductance Selection in Shunt Active Power Filter

并联型有源电力滤波器(active power filter,APF)交流侧输出电感是连接APF与电网的桥梁,直接影响补偿电流的动态性能,对有源滤波器的补偿特性起着决定性作用。针对电压源并联型有源电力滤波器电感注入电路的拓扑,提出一种严格的基于谐波电流分析的并联型APF输出电感值确定方法。它能根据补偿目的的不同准确计算出最优的电感值。通过对电力系统中广泛存在的非线性整流负载的仿真,验证了该方法的正确性和可行性。

The AC side output inductance of shunt active power filter （APF） is like a bridge which connects APF and the grid. It affects the dynamic performance of compensation current directly,so plays a decisive effect to the compensation characters of APF. Aiming at the topology structure of voltage-source shunt APF with inductance-injecting topology,a rigid output inductance calculation method of shunt APF was proposed based on harmonic current analysis which could work out the optimum output inductance values according to different compensation objectives. The validity and feasibility were validated through the simulation of a non-linear rectifier load which was commonly used in power system.