基于小波变换的行波极性比较式方向保护原理研究  

DIRECTIONAL PROTECTIVE RELAYING BASED ON POLARITY COMPARISONOF TRAVELLING WAVE BY USING WAVELET TRANSFORM

作　　者：董杏丽[1] 董新洲[2] 张言苍[3] 郭效军[3] 葛耀中[1] 

机构地区：[1]西安交通大学电气工程学院,西安710049 [2]清华大学电机系,北京100084 [3]国家电力公司南京自动化股份有限公司,南京210003

出　　处：《电力系统自动化》2000年第14期11-15,29,共6页Automation of Electric Power Systems

基　　金：国家自然科学基金!资助项目 (5 98770 2 0 )

摘　　要：以小波变换为工具提取行波信号中的故障信息 ,实现行波极性比较式方向保护原理 ,避免了基于该原理的 RALDA保护受谐波影响的问题。对其在不同影响因素作用下的动作情况进行了详细的分析和仿真 ,解决了其中存在的问题。分析和仿真结果表明 ,利用小波变换后该原理是实际可行的。The fault information of tlavelling wave is detected. and then the principle of directional protective relaying basedon polarity comparison of travelling wave is analyzed by using wavelet transform. The problem of misoperatlon due toharmonic encountered by RADLA Is avoided by using wavelet transform. The relay action under different conditions issimulated and the problems have been solved. The results indicate that the principle of directional relay based on polaritycomparison of travelling wave by using wavelet transform is feasible.This project is supported by National Natural Science Foundation of China (No. 59877020).

关 键 词：行波 极性比较 方向保护 小波变换 线性保护 

分 类 号：TM773[电气工程—电力系统及自动化]