摘要
复合绝缘子在我国20多年的使用表明:与瓷和玻璃绝缘子相比,其防污闪性能优异,但防冰闪性能较差;伞裙结构是影响其冰闪电压的重要因素。基于此,模拟实际输电线路运行中的复合绝缘子覆冰情况,选取数种伞裙结构的35kV和110kV复合绝缘子进行了带运行电压覆冰试验。试验表明,同电压等级、不同伞裙结构的复合绝缘子其冰闪电压差别很大。根据试验数据进行了仿真计算,从电场角度分析了伞裙结构对冰闪电压的影响,计算结果与试验结果比较相符。最后,对该2种电压等级的绝缘子伞裙结构分别进行了优化。仿真分析表明,在相同覆冰条件下,优化后的绝缘子电场特性比优化前有了明显改善。
Composite insulators have been used in power system for more than 20 years in China.Compared to porcelain and glass insulators,the pollution flashover performance of composite insulators is better,whereas its icing flashover performance is poor.Sheds configuration is a key factor that influences composite insulator＇s icing flashover voltage.Thereby,we simulated icing conditions of composite insulators actually operated in transmission lines,and several energized icing tests of 35 kV and 110 kV composite insulators with different sheds configurations,showing that remarkable differences exist between the icing flashover voltages of the same voltage grade composite insulators with different sheds configuration.On the basis of simulation electric field of the iced insulators,we analyzed the influence of sheds configuration on icing flashover voltage from the point of electric field performance,and found that the calculation results were consistent with the experimental ones.Moreover,we optimized sheds configuration of the above two kinds of insulators with different voltage grades,respectively.The simulation analysis shows that,at the same icing conditions,the electric field performances of the optimized insulators are significantly improved.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2013年第1期210-217,共8页
High Voltage Engineering
基金
国家重点基础研究发展计划(973计划)(2009CB724501)
国家自然科学基金(51107151)~~
关键词
复合绝缘子
冰闪电压
带电覆冰
电场
伞裙结构
优化
composite insulators
icing flashover voltage
energized icing
electric field
sheds configuration
optimization
