基于改进i^p-i^q屯法谐波电流检测法  

Improved Method of Detecting Harmonic Currents Based On i^p-i^qmethod

作　　者：张磊[1] 韩明奇[1] 孟庆昌[1] 尚超[1] 

机构地区：[1]濮阳供电公司,河南濮阳457000

出　　处：《时代报告（学术版）》2012年第12期34-35,共2页Time report

摘　　要：有源电力滤波器要求能够实时、准确地检测出电网中实时变化的谐波电流。针对现阶段对三相不平衡电网谐波电流检测方法中普遍存在着误差，提出了一种基于瞬时无功功率理论的改进型的i^p-i^q谐波电流检测法。该方法可以在电网电压不平衡状态下检测出谐波电流，而不会把基波负序电流与谐波电流同时提取出来．便于工程中有源滤波器只对谐波电流进行补偿。该方法也适用于电网平衡时的谐波电流检测。运用MATLAB软件进行仿真的结果表明：该方法简单可靠、实时性好、检测精度高。Real time and accurate reference current signal is vital for active power filter （APF）. So, a lot of method for three-phase unbalance electric network harmonics current detecting have been proposed to improve the performance of active power fiker. To avoid some shortages which exist in the harmonic current detecting methods now, an improved i^p-i^qalgorithm based on instantaneous reactive power theory is presented. The algorithm can detect the harmonic current ef- fectively not only under the balanced power system, but also under the unbalanced power system too. This method will not extraction base negative seouence current and harmonic currents at the same time to facilitate the project only on the active fiter harmonic current compensation. With the MATLAB simulation results, it has been proved that this method has features such as simple and reliable algorithm, good real-time performance, high detection accuracy.

关 键 词：有源滤波器 谐波检测 瞬时无功功率 基波负序电流 

分 类 号：TM935.23[电气工程—电力电子与电力传动]