输电线路绝缘子泄漏电流的句法模式识别  

Syntactical Pattern Recognition for Leakage Current of Transmission Line Insulators

作　　者：姚陈果[1] 毛峰[1] 匡红刚[2] 张茂春[2] 姜毅[2] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030 [2]重庆市电力公司万州供电局,重庆404000

出　　处：《高电压技术》2010年第6期1487-1493,共7页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724507)~~

摘　　要：针对目前绝缘子在线监测系统基于泄漏电流信号分析的诊断和预警很难准确分析其表面的污秽放电状况的问题,提出了绝缘子泄漏电流信号的句法模式识别方法。该方法对泄漏电流信号进行分段线性化提取基元,然后根据给定的文法构成语言识别装置"有限自动机",并以此为判据判断泄漏电流信号是何种模式。在代号为Acqs的软件中嵌入了句法模式识别的模块,并对以下3种情况进行了实测验证:①不同湿润程度染污绝缘子的泄漏电流;②不同电压下轻度湿润染污绝缘子的泄漏电流;③极性效应。实测结果表明,利用句法模式识别方法能够获得泄漏电流信号全面的结构信息,从而可以更深入地把握绝缘子表面放电的特性,并且能对绝缘子泄漏电流的极性效应做出准确和全面的识别。The analytical method for leakage current in the current online monitoring system of insulators could not be used to accurately judge the pollution grade on insulators,so a novel method for analyzing leakage current,which was syntactical pattern recognition,was introduced.Based on this method,geometric primitives were extracted by piecewise linearization for the leakage current signals,then in accordance with the given grammar,a language recognition unit,whose name was finite automaton,was composed of these primitives.Thereafter,the finite automaton the leakage current signals were judged to be which pattern.The syntactical pattern recognition module was embedded into the Acqs software,and this method’s performance was validated under the following three conditions：①the leakage current of polluted insulators under different degrees of wetness;②the leakage current of mild degree of wetness and polluted insulators under different voltage values;③polarity effect.The results show that the structure information of leakage current can be roundly acquired by the syntactical pattern recognition method.Consequently,the surface discharge characteristics of insulators can be deeply grasped,and the polarity effect of the leakage current of insulators can be accurately and fully recognized.

关 键 词：句法模式识别 输电线路 绝缘子 泄漏电流 Acqs软件 结构特征 

分 类 号：TM855[电气工程—高电压与绝缘技术] TM216[一般工业技术—材料科学与工程]