基于i_p-i_q运算方式与小波变换串联谐波检测方法

A Series Harmonic Detecting Method Based on i_p-i_q Calculating Modes and Wavelet Trans form

由于瞬时无功功率理论中的_ip-i_q运算方式检测三相谐波电路中的低频非整次谐波不能得到很好的检测效果,提出基于i_p-i_q运算方式与小波变换串联谐波检测方法。该方法先利用i_p-i_q运算方式去除各相谐波中大部分的整次谐波,再利用小波变换去除各相中的非整次谐波,并与每种方法单独使用相比较,通过两次不同方式的谐波检测从而达到滤除三相电路中谐波的效果。在Matlab/Simulink软件环境下对该方法进行仿真实验,验证该方法的正确性。

Due to theip-iqcalculating modes of the instantaneous reactive power theory could not get very good detection resuhs in the detection of low frequency and non integer harmonics in three-phase harmonic circuits. A series harmonic detecting method is presented on basis ofip-iqcalculating modes and wavelet transform. In this method. The ip-iq calculating modes is used to remove most of the integer harmonics. Then, Wavelet transform is used to remove the non integer harmonics of each phase. And compared with the individual use of each method. By two different ways of harmonic detection to achieve the effect of harmonic wave in three-phase circuit. With MATLAB simulation software, a research on simulation of the method. Finally, verify the correctness of the method.