三相不对称系统中谐波电流检测的新方法  

New Method of Harmonic Current Detection for Unbalanced Three-phase Power System

作　　者：郑征[1] 杜翠静[1] 常万仓[2] 

机构地区：[1]河南理工大学电气工程与自动化学院,焦作454003 [2]新华水利水电投资公司,北京100053

出　　处：《电力系统及其自动化学报》2010年第3期50-54,共5页Proceedings of the CSU-EPSA

基　　金：河南省教育厅自然科学基金项目(2008A470004);河南省重大攻关项目(082102240008)

摘　　要：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误差,提出一种基于瞬时无功功率理论的改进型ip、iq谐波电流检测法。该方法通过建立新的数学模型和改进算法可以在电网不平衡状态下实时、准确检测出谐波电流,便于工程中有源滤波器只对谐波电流进行补偿。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。Since the existing methods of harmonic current detection for unbalanced three-phase power system have the errors general,an improved ip ,iq algorithm of detecting the harmonic current based on instantaneous reactive power theory is presented. This new method can detect accurately the harmonic current in real-time under the state of the unbalanced power system through establishing the new mathematical models and modeifying the algorithm,which facilitate the active power filter to only compensate the harmonic current in projects. Simulation results with the MATLAB software show that this method offers simplicity of design, reliability, good real-time performance and 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[电气工程—电力电子与电力传动]