超高频扫描比较式局部放电在线监测系统  

Online partial discharge monitoring system by UHF scanning and comparison

作　　者：杜林[1] 颜梁钦[1] 甘德刚 李剑[1] 唐平[3] 谢奇峰[3] 

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]四川省电力科学研究院,四川成都610072 [3]国电南京自动化股份有限公司,江苏南京210032

出　　处：《电力自动化设备》2012年第6期120-124,共5页Electric Power Automation Equipment

基　　金：国家创新研究群体基金资助项目(51021005);国家重点基础研究发展计划(973计划)(2012CB215200)~~

摘　　要：根据工频电压作用下局部放电具有工频周期重复性的特征,设计出一种新型的超高频扫描式局部放电监测系统。该系统运用高频放大滤波器、复杂可编程逻辑器件和高频比较器构成超高频局部放电智能监测单元,通过电平扫描的方法实现局部放电φ-q、φ-n、φ-q-n谱图及放电特征的提取,并通过网络将数据传送至后台主机。该系统不需要A/D采集卡,数据处理量少,扩展性好,成本低。实验表明该系统可进行实时在线监测,提取局部放电信号的放电幅值、放电次数等特征量。The partial discharge under power frequency vohage has the characteristic repeatability of power frequency,according to which,a UHF-scanning-type of partial discharge monitoring system is designed. Its intelligent partial discharge monitoring unit is composed of the high frequency filter and amplifier,field programmable gate array and high frequency comparator,the φ-q、φ-n and φ-q-n spectrums of partial discharge and the discharge characteristic variables are extracted by pulse scanning,and the data are transferred to superordinate computer via network. Without A/D acquisition card and massive data processing, the designed system has good expansibility monitoring of partial discharge and extract and low cost. Experiments show that the characteristic variables,such as ,it can carry out the real-time discharge amplitude ,discharge times, etc.

关 键 词：超高频 局部放电 特征量 扫描 监测 

分 类 号：TM835.4[电气工程—高电压与绝缘技术]