电力系统谐波和基波无功检测改进方法  

Improved detection method of harmonic and fundamental reactive power in power system

作　　者：任明炜[1] 孙玉坤[1] 郑红平[2] 郭涛[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013 [2]浙江林学院理学院,浙江临安311300

出　　处：《江苏大学学报（自然科学版）》2006年第1期63-66,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：江苏省高新科技项目(BG2004024)

摘　　要：准确、快速地检测电网电流中的谐波成分,是谐波抑制和无功补偿的关键.在小波分析的基础上,结合瞬时无功功率理论,提出了一种谐波和基波无功检测的改进方法.该方法能检测各次谐波和基波无功分量,且运算过程可用软件来实现,不必依赖昂贵的元件和复杂的电路.Matlab仿真结果表明:该方法能实时检测谐波电流和基波无功电流,且检测精度高,动态相应快.Detecting fast and precisely the harmonic component of network current is very important to depress harmonics and compensate reactive power. By using the instantaneous reactive power theory, a kind of improved method in detecting harmonic and fundamental reactive power based on wavelet analysis is proposed. The proposed method can detect all orders of harmonics and fundamental reactive components. The whole operation process can be realized by software. The scheme needn＇t expensive elements and complex circuits. The results of Matlab simulation show that the method can detect timely harmonic current and fundamental reactive power current. High detection precision and quick dynamic response are obtained.

关 键 词：电力系统 谐波 基波无功 小波分析 瞬时无功功率 检测 

分 类 号：TM743[电气工程—电力系统及自动化]