特高压变压器套管局部放电试验技术分析  

Analysis on the Partial Discharge Test Technology of UHV Transformer Bushing

作　　者：聂德鑫[1] 伍志荣[1] 罗先中[1] 杜振波[1] 程林[1] 刘诣[1] 邓建钢[1] 宋友[1] 饶文峰[1] 黄华[1] 

机构地区：[1]国网电力科学研究院,武汉430074

出　　处：《高电压技术》2010年第6期1448-1454,共7页High Voltage Engineering

基　　金：国家电网公司特高压交流试验示范工程单项研究专题(SGTGY[2009]632)~~

摘　　要：为了完成特高压交流变压器套管的局部放电试验并指导特高压设备的局部放电测量,研究了在1100kV电压下进行套管局部放电试验的抗干扰措施和测量方法。根据特高压交流变压器套管型式试验的要求,套管局部放电试验的最高电压为1100kV,套管的局部放电量应<10pC,这对试验能力的要求已达到国内试验条件的极限。在试验室对该套管完成的局部放电试验结果表明:试验场地布置、试验环境温湿度控制等都会对套管局部放电测量产生影响;使用紫外成像仪和红外成像仪可快速有效的排除试验场地内的悬浮放电干扰源;采用不完全平衡法的试验回路可以进一步排除干扰,从而成功进行特高压套管局部放电测量。In order to test the partial discharge of UHV AC transformer’s bushing and guiding partial discharge measurements of UHV equipment,the anti-interference and measurement methods of partial discharge test of UHV AC bushing were studied at the voltage of 1100 kV.According to UHV transformer bushing type test requirements,the maximum test voltage is 1100 kV,and partial discharge magnitude should be less than 10 pC.The test requirements have reached the limits of experimental conditions in domestic.In the laboratory,the test was accomplished.The results show that,the layout of equipment in laboratory,the environment control including temperature and humidity,and so on,will affect the measurements of partial discharge of bushing,using ultraviolet imaging and infrared imaging device can quickly and effectively exclude the interference of suspended discharge within the test site,using no entirely balanced test circuit can further eliminate interference to the success of partial discharge measurement of UHV AC bushing.

关 键 词：特高压交流 套管 变压器 局部放电测量 不完全平衡回路 抗干扰 

分 类 号：TM835[电气工程—高电压与绝缘技术]