有源电力滤波器改进型谐波检测方法的仿真

Simulation on the Improved Harmonic Current Detecting Method of APF

有源电力滤波器是补偿谐波的有效装置,而其最关键的部分就是谐波检测环节,它决定着谐波补偿效果的好坏。对一种改进的ip-iq谐波电流检测方法进行了深入研究,并在其检测总谐波电流基础上将其推广到了检测特定整数次谐波电流。此方法省去了传统ip-iq变换中两相与三相之间的互相转换,使计算过程大大简化,且不需要锁相环就可以获得同步旋转角,消除了锁相环调试困难、有延时等不足。根据该方法还建立了Simulink仿真模型,在检测总谐波电流和检测特定整数次谐波电流两种情况下进行了仿真研究,证明了该方法的正确性。

Active power filter （APF） is an effective equipment of compensating harmonics, the most important part of which is harmonic detecting that determines the effective of harmonic compensation. An improved ip-iq detecting method was researched deeply and extended to detect special integer harmonic current. It simplifiers the computation by omitting the mutual conversion between three-phase and two-phase of traditional ip-iq transform, and eliminates debugging difficulty and time delay by obtaining the synchronous rotary angle without phase lock loop（PLL）. Furthermore, the simulation model is established and simulated in both situations of the complex harmonic current detecting and the special integer harmonic current detecting, and the result proves the validity of the method.