GIS局部放电特高频传感器接收特性表征研究  

Study on Receiving Characteristics of the UHF Sensor for GIS Partial Discharge

作　　者：李兴旺[1] 卢启付[1] 唐志国[2] 许鹤林[2] 叶齐政[3] 陈田[3] 

机构地区：[1]广东电网公司电力科学研究院,广东广州510080 [2]华北电力大学新能源电力系统国家重点实验室,北京102206 [3]华中科技大学强电磁工程与新技术国家重点实验室,湖北武汉430074

出　　处：《广东电力》2013年第9期55-60,共6页Guangdong Electric Power

摘　　要：气体绝缘金属封闭式开关设备(gas insulated metal enclosed switchgear and controlgear,GIS)局部放电特高频(ultra high frequency,UHF)传感器的接收特性对GIS在线监测、模式识别及故障定位具有重要的影响。利用天线等效高度,研究了GIS局部放电测量时UHF传感器的接收性能,通过吉赫兹横电磁波(gigahertz transverse electromagnetic,GTEM)平台测试了A、B两种传感器的频响特性曲线,发现B传感器在300～1 500MHz测试频带内的平均天线等效高度为A传感器的1.66倍。在实际GIS平台上进行模拟局部放电检测试验,结果也表明B传感器能够有效检测的局部放电信号强度大于A传感器。上述结果表明了采用300～1 500 MHz测试频带内的等效高度曲线来表征UHF传感器接收特性的真实有效性。Receiving characteristics of the ultra high frequency sensor respecting partial discharge in gas insulated metal en- closed switchgear have an important impact on online monitoring, pattern recognition and fault positioning of GIS. This pa-per studies receiving performance of the UHF sensor when measuring GIS partial discharge by using equivalent height of an- tenna. By means of gigahertz transverse electromagnetic platform, it studies testing for frequency response characteristic curves of A and B sensors and discovers that equivalent height of B sensor is 1.66 times more than A＇s within the testing fre-quency range of 300-1 500 MHz. While the B sensor can detect partial discharge signal strength more effectively than A sensor in GIS partial discharge simulation experiments. These results prove effectiveness and authenticity of using the equiva- lent height curve within 300-1 500 MHz to represent the receiving characteristics of the UHF sensor.

关 键 词：气体绝缘金属封闭式开关设备 局部放电 特高频 传感器 接收特性 

分 类 号：TM855[电气工程—高电压与绝缘技术]