一种谐波与无功电流检测方法的探讨  

Research on a Method for Harmonic and Reactive Current Detection

作　　者：邓才波[1] 罗安[1] 刘芸[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《电力电子技术》2013年第3期81-83,共3页Power Electronics

摘　　要：随着电力系统中非线性负载的增加,谐波污染及无功功率的不足成为影响系统电能质量的严重问题。有源电力滤波器(APF)作为一种有效的谐波治理装置,同时能补偿无功功率。能否准确快速获得谐波及无功电流指令信号对于APF的治理效果具有直接的影响。研究了一种谐波和无功电流检测方法,分析并设计了其中起关键作用的低通滤波器和三相锁相环。对该方法进行了理论及仿真分析,同时介绍了其数字实现,说明了该检测方法的准确性和易实现性。最后通过实验验证了该方法的有效性,为其工程应用奠定了基础。Along with nonlinear load increases in the power system, the harmonic pollution and reactive power shortage become serious problems for system power quality.Active power filter（APF）, as an effective harmonic control device, can compensate the reactive power.The ability to get harmonic and reactive current signals accurately and quickly have direct influence on the control results of APF.This paper studies a kind of harmonic and reactive current detection method, also analyzes and designs the two critical part of the method low pass filter and three-phase locked loop. The theoretical and simulation analysis and its digital realization introduction show the accuracy and availability of the test method.Experimental results prove the validity of this method,which lays the foundation of engineering application.

关 键 词：有源电力滤波器 无功电流检测 锁相环 低通滤波 

分 类 号：TM713[电气工程—电力系统及自动化]