交流特高压避雷器电压分布的测量与分析  

Measurement and Analysis About the Potential Distribution of the 1000 kV Metal-oxide Surge Arrester

作　　者：王保山[1] 刘斌 张曦[1] 贾锦朝[1] 汤霖[1] 熊易[1] 左中秋[1] 陈立[1] 

机构地区：[1]国网电力科学研究院,武汉430074 [2]南阳金冠电气有限公司,南阳473057

出　　处：《高电压技术》2008年第9期1781-1787,共7页High Voltage Engineering

基　　金：国家电网公司重点科技项目(SGTGY[2008]614)~~

摘　　要：由于1000kV交流特高压氧化锌避雷器(MOA)因其元件数多、结构高度尺寸巨大,其电压分布会影响其安全运行,探讨了该电压分布不均匀系数的测量。光纤电流法是一种有效的测量方法,利用此方法可对典型设计的交流特高压MOA进行电压分布试验;通过测量结果合理调整并联补偿电容的方法,获得了理想的均压效果。同时还分析了影响测量结果的各种因素和产品制造过程中应注意的问题。经比较和综合考虑,最优方案的最大电压不均匀系数可达+6.29%,完全可满足交流特高压MOA技术条件对电压分布特性的要求。Because of the more units and the giat dimensions, it shoud been payed much more altention to the problem about the potential distribution of the MOA used in 1000 kV ultra high voltage（UHV） power system. The excessively high electric load rate would make the MOR be accelerated ageing much speedly even to result in thermal breakdown. So the uneven coefficient of potential distribution of the UHV MOR must be controlled and restricted to an adequate level. The uneven coefficient of potential distribution usually can be got by simulating electric field cal- culating or by measurement. Optical fiber current method is a good method for measuring the potential distribution, it was used to measure the potential distribution of a typical designed UHV MOA. A lot of test results was got through adjusting the parallel capercitance. Meanwhile, it was analyzed to the different kinds of influence factors to the measured results and the problems which should be noticed during the process of the products manufacturing. After comparing and the comprehensive considering, the maximum uneven coefficient of potential distribution of the best option can be reached by ＋6. 29% , that can completely fulfill the UHV MOA specification of the SGCC.

关 键 词：交流特高压 MOA 光纤电流法 并联电容 电压分布 不均匀系数 

分 类 号：TM835[电气工程—高电压与绝缘技术] TM862