应用HPF同时检测高次谐波与无功电流方法的讨论

DISCUSSION ON THE METHOD OF DETECTING HIGH HARMONIC AND REACTIVE CURRENTS SIMULTANEOUSLY WITH APPLICATION OF HIGH PASS FILTER

基于三相电路瞬时无功功率理论 ,对一种应用高通滤波器 ( HPF)同时检测高次谐波与无功电流的方法进行了讨论 ,认为应略去无功电流通道的一个 HPF后直接连接 ,就能同时检测出被检测电流中的谐波和无功电流。利用 MATLAB软件进行了计算机仿真研究 ,仿真结果证明了该方法的正确性和可行性。

Based on the instantaneous reactive power theory of three phase circuit, the method of detecting high harmonic and reactive currents simultaneously, applying high pass filter is discussed. A new method is given that high harmonic and reactive currents are detected simultaneously when connecting the reactive current channel directly, not using high pass filter. Making use of MATLAB software, computer simulation studies are made to validate correctness and feasibility of the proposed method.