基于波形相似的谐波及无功电流检测  

Detection of Harmonic and Reactive Power Based on Waveform Similarity Theory

作　　者：周丽霞[1] 袁瑞铭[1] 宋伟[2] 李顺昕[1] 钟侃[1] 

机构地区：[1]华北电网有限公司计量中心,北京100045 [2]华北电网有限公司,北京100053

出　　处：《电测与仪表》2011年第6期6-8,22,共4页Electrical Measurement & Instrumentation

摘　　要：非线性负荷所产生的谐波对电网造成了极大的危害,本文分析了现有的谐波及无功电流检测方法,从最小能量损耗的分析入手,得到了与之密切相关的电压和电流的波形所满足的条件,并以电压和电流的最小能量误差为判据,提出了一种基于波形相似理论的谐波及无功电流检测方法。通过PSCAD仿真验证了该检测方法的有效性和正确性。The harmonics produced by the non-linear load have resulted in higher incidences of harmonic distortion in the current waveforms which may distort the system voltage waveforms eventually.The existing methods for detecting the harmonic and reactive power are analyzed in this paper.Furthermore,due to the minimum energy losses,the related voltage and current is obtained.Taking the minimum energy error as the criterion,a harmonic and reactive power detecting method is put forward based on the waveform similarity theory.The validity and accuracy is verified by the PSCAD simulation.

关 键 词：波形相似 无功功率 谐波检测 补偿 

分 类 号：TM93[电气工程—电力电子与电力传动]