非线性负载下并联型APF谐波电流控制方法

随着电力电子装置中电压源型非线性负载的使用越来越多,并联型APF的谐波补偿特性受到了严重影响。通过理论分析并联型APF不适合补偿电压源型非线性负载的原因,提出一种基于VR控制器的选择性谐波电流控制方法,对指定次谐波分别控制,在提高系统稳态性能的同时,抑制谐波电流放大效应,使在这类非线性负载下并联型APF的谐波补偿特性得到了有效改善。通过仿真以及实验验证了该控制方法的有效性。

Harmonic Current Control Method of Shunt APF for Nonlinear Loads

Nowadays, as voltage-source type nonlinear loads in power electronic equipment are increasingly used, the harmonic compensation characteristic of shunt APF is serious. Through theoretical analysis, expounding the reason why shunt APF is not suitable for compensation of voltage-source type nonlinear loads, and proposing a selective harmonic current control method which bases on vector resonant controller. Meanwhile, this method can implement the selective harmonics control. On the one hand, it can improve the steady-state performance of the system. On the other hand, it can suppress harmonic current amplification effect and effectively improve the harmonic compensation characteristic of shunt APF for this kind of nonlinear load. The effectiveness of control method is verified by simulation and experiment.