基于谐波解耦的有源电力滤波器控制方法

分析了基于ip,iq原理的有源电力滤波器(APF)控制方法存在稳态误差的原因;提出了基于谐波解耦的选择性谐波电流控制方法。该方法对各次谐波的幅值误差进行PI调节,实现了无差跟踪;同时分析了相位检测误差对谐波检测及直流侧电压控制的影响,通过在反变换中加入补偿相角来补偿相位检测误差对直流侧电压控制的影响。实验证明,基于谐波解耦的APF控制方法可以显著提高APF的电流跟踪控制精度,改善系统的滤波效果。

Research on Harmonics Decoupling Control of Active Power Filter

The steady state error issue of Active Power Filter (APF)based on ip,iq control strategy is analysed,and a current control method based on harmonic decoupling is proposed.By using PI-conditioning,this method regulates the amplitude of selected harmonics to achieve non-error tracking.The negative impact of phase detection error on harmonic detection and DC-link voltage control is also analyzed,and by adding additional phase in the anti-transform this impact is com- pensated.Simulative and experimental results prove that the proposed harmonic decoupling control method can improve the accuracy of APF current detection and the performance of harmonic compensation.