高压电器2011，Vol.47Issue(10)：115-120,6.
金属颗粒对LW13-550罐式断路器电场的影响分析
Influence of Metallic Particulates to 3D Electric Field of LW13-550 Tank Circuit Breaker
李世琼 1裴长生 2王泽忠 1曹明德 2郭红颖3
作者信息
- 1. 华北电力大学高电压与电磁兼容北京市重点实验室,北京102206
- 2. 山西超(特)高压输变电分公司,太原030032
- 3. 山西省电力公司, 太原030001
- 折叠
摘要
Abstract
LW13-550 tank circuit breakers are used widely in 500 kV power system. Their insulation faults were caused by discharge between contact shield and breaker shell. Disassembly inspection and test results indicate that the metallic particulates on the wall of tank under the shield caused the discharge, or even insulation breakdown. To quantitatively analyze the relationship between the discharge and the size of metallic particulates, 3D electric field in the tank circuit breaker needs to be calculated. We proposed a 3D electric field calculation model of the tank circuit breaker with metallic particulates in it, and solved the model with FEM. The calculation results show that: ① a metallic hemisphere-head column with the height of 5 mm and the diameter of lmm can induce a maximum surface electric field intensity far higher than the breakdown field intensity of 0.5 Mpa SF6 gas to lead to insulation breakdown in the break;② a metallic column with the height less than 5 mm will induce electric field deformation around it to result in local discharge or even insulation breakdown.关键词
LW13-550罐式断路器/金属颗粒/三维建模/电场/绝缘故障Key words
LW13-550 tank circuit breaker/ metallic particulates/ 3D modeling/ electric field/ insulation fault分类
信息技术与安全科学引用本文复制引用
李世琼,裴长生,王泽忠,曹明德,郭红颖..金属颗粒对LW13-550罐式断路器电场的影响分析[J].高压电器,2011,47(10):115-120,6.
