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有源电力滤波器的工作性能很大程度上取决于对谐波和无功电流高精度、实时的检测上。提出了一种基于瞬时无功功率理论ip,iq谐波检测法的改进法,构建了一种最小均方(LMS)自适应滤波器作为检测电路中的低通滤波器,使检测系统获得良好的检测精度和良好的响应速度,进而获得良好的谐波补偿效果。基于MATLAB的计算机仿真实验验证了该谐波电流检测算法的正确性和有效性。
Active power filter performance depends largely on the harmonic and reactive current high-precision, real-time detection. An improved method based on instantaneous reactive power theory ip and iq harmonic detection is proposed. A minimum mean square (LMS) adaptive filter is constructed as a low-pass filter in the detection circuit to make the detection system well The detection accuracy and good response speed, and then get a good harmonic compensation effect. The computer simulation based on MATLAB verifies the correctness and validity of the harmonic current detection algorithm.