并联间隙均匀复合绝缘子电压分布特性  

Voltage Equalizing Characteristics of Composite Insulator with Parallel Gap Lightning Protection Device Employed

作　　者：杨庆[1] 谭威[1] 司马文霞[1] 罗兵[2] 李锐海 袁涛[1] 

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]南方电网科学研究院有限责任公司,广州510080

出　　处：《高电压技术》2011年第8期1910-1915,共6页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724504);国家自然科学基金(50707036)~~

摘　　要：为了研究并联间隙装置对绝缘子串电压分布特性的影响,用有限元法建立了220 kV输电线路复合绝缘子三维电场计算模型来研究加装不同并联间隙装置后的绝缘子电压分布,并和加装均压环后电压分布进行对比。计算结果表明:环形并联间隙对绝缘子的均压效果明显优于棒形并联间隙,环形间隙环径越小,管径越大,其改善复合绝缘子端部的电场及电压分布作用越明显,而罩入深度太大则不利于绝缘子端部电压分布的改善,不能有效屏蔽复合绝缘子根部。此外,通过和加装均压环后绝缘子电压分布的对比发现,利用环形并联间隙取代均压环是可行的。In order to analyze the impact of parallel gap lightning protection device（PGLPD） on the voltage distribu- tion along insulators,taking 220 kV composite insulators as example, we established a three-dimensional electric field calculation model of composite insulators of the transmission line by the finite element method. The impact of different types of PGLPD on the voltage distribution along insulators is analyzed. The voltage distribution along in- sulators when PGLPD and shielding rings is employed separately is compared. Results show that the performance of the ring type PGLPD is superior to that of stick type PGLPD. For the ring type PGLPD, when its cube diameter is longer and ring diameter is shorter, the voltage equalizing characteristic is better. And better voltage equalizing characteristic can be obtained when the insertion depth of PGLPD is suitable. Moreover, simulations demonstrate that it is feasible to use ring type PGLPD as an alternative of shielding rings.

关 键 词：并联间隙 复合绝缘子 有限元法 三维电场模型 电压分布 均压环 

分 类 号：TM216[一般工业技术—材料科学与工程]