带金属法兰的110kV盆式绝缘子局部放电特性研究  

Research on Partial Discharge Characteristics of 110 kV Basin Insulator with Metal Flange

作　　者：石文广[1] 张建宏 王蕾[1] 高锵源 

机构地区：[1]厦门理工学院福建省高电压技术重点实验室,福建厦门361024 [2]麦克奥迪(厦门)电气股份有限公司,福建厦门361101

出　　处：《高压电器》2016年第10期69-74,共6页High Voltage Apparatus

基　　金：国家自然科学基金项目(51008262);福建省自然科学基金项目(2015J01651);福建省科技计划项目(2015H0041)~~

摘　　要：在对大量的盆式绝缘子电气性能测试过程中,发现带有金属法兰的盆式绝缘子在正常测试条件下,局部放电测试存在不稳定的现象。文中通过三维有限元仿真分析同时结合验证性试验,从理论和实验上确认了该现象发生的根本原因在于外围金属法兰与环氧树脂浇注材料间的气隙宽度偏低,最终导致气隙发生局部放电。同时仿真结果表明:气隙宽度和环氧浇注材料的介电常数对气隙电场有较大影响,气隙宽度越小,相应气隙电场越大;介电常数越大,相应气隙电场越大。针对查找出的问题点,提出通过改变填料的比例份数来调节环氧树脂浇注材料的介电常数和气隙宽度,达到了优化气隙电场的目的,提高了产品的合格率。In the processes of electrical performance test for a large number of basin insulators,it is found that the partial discharge test of the basic insulator with metal flange existed the phenomenon of instability under normal test conditions. This paper combines the three dimensional finite element simulation analysis with the verification test at the same time, it is confirmed that the main cause of this phenomenon is due to the lower air gap width, and the air gap has contributed to partial discharge, the same simulation results showed that, the width of the gap and the dielectric constant of epoxy resin casting materials have a greater impact on the electric field in air gap. The smaller the width of the air gap leads to the higher electric field in the gap, and the greater the dielectric constant leads to the higher the electric field in the gap. By changing the proportion of filler parts to adjust the dielectric constant and the air gap width of the epoxy resin casting material, the electric field in the air gap has been optimized. The qualified rate of the product has been improved.

关 键 词：盆式绝缘子 局部放电 填料 气隙宽度 介电常数 

分 类 号：TM216[一般工业技术—材料科学与工程]