变压器油中局放UHF信号能量与放电量的关系  

Relationship Between UHF Signal Energy and Charge Quantity of Partial Discharge in Transformer Oil

作　　者：唐炬[1] 周加斌[1] 胡忠[2] 刘蕾[2] 张晓星[1] 

机构地区：[1]重庆大学输变电装备及系统安全与新技术国家重点实验室,重庆400044 [2]重庆市电力公司城区供电局,重庆400010

出　　处：《高电压技术》2009年第5期1009-1013,共5页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724506);国家自然科学基金(50777070)~~

摘　　要：为研究变压器油中的金属微粒缺陷下局部放电(PD)放电量与超高频(UHF)信号累积放电能量之间的关系,利用50Ω无感电阻测量电流脉冲和超高频电磁波检测系统,对两种检测方法的实验室人工模拟变压器PD信号进行了测量,发现变压器油中的金属微粒缺陷下的局部放电放电量和UHF信号累积能量之间有二次曲线关系,且当电压与缺陷质量增加时,PD的放电量与天线接收的累计能量均会增加。这一结果表明:结合IEC 60270标准,可以通过计算UHF信号累积能量来获取局部放电量,这为进一步系统研究用超高频法定量检测PD的难题,提供了一种有价值的方法和手段。In order to study the correlation between partial discharge （PD） charge quantity and ultra high frequency （UHF） radiated charge energy, utilizing an integrated measurement system, PD activity was recorded simultaneously in terms of 50 12 non-inductive resistance current pulses and UHF signals. Results indicate that the relationship between cumulative energy and the charge quantity of PD current pulses for metal particles in the power transformer oil is a quadratic equation. Therefore,by combining IEC 60270 standard measurement with 50 Ω non-inductive resistance measurement, the UHF detection could be quantified and proved useful as an advanced means of power transformer defect identification.

关 键 词：局部放电 金属微粒 超高频 放电量 放电能量 二次曲线 

分 类 号：TM835[电气工程—高电压与绝缘技术]