一种新型有源滤波器谐波提取方法和控制策略

提出并实现了一种能在电网电压存在畸变和不对称条件下准确提取电网中谐波和无功电流的检测方法。从矢量分析角度出发，通过对三相电网电压和电流矢量在dp坐标系下进行投影变换，实现谐波和无功电流的提取。补偿电流采用预测电流控制，获得了较好的补偿特性和控制精度。对5kVA有源滤波器和150kVA混合滤波器的实验结果验证了所提出方法的可行性和正确性。

NOVEL HARMONIC DETECTION METHOD AND CONTROL STRATEGY FOR ACTIVE POWER FILTER

This paper presents and realizes a detection method which can accurately extract harmonic and reactive currents under asymmetric or distorted supply voltage conditions. The proposed method extracts harmonic and reactive currents through three-phase voltage and current vectors project transformation in dq coordinate. Predictive current control is adopted to obtain compensation currents, which has good control precision and compensation performance. Experimental results obtained from the 5 kVA active power filter (APF) and the 150 kVA hybrid-type APF have confirmed the feasibility and correctness of the proposed method.