摘要
高压输电线路硅橡胶防鸟罩可有效避免鸟粪滴落引起的绝缘子串闪络故障,但在强风下很可能发生撕裂。为研究不同电压等级输电线路硅橡胶防鸟罩的抗风性能,采用有限元仿真软件ANSYS Workbench对绝缘子周围流场进行仿真分析。设计了一种具有金属骨架结构的新型硅橡胶防鸟罩并仿真分析不同规格尺寸的新型防鸟罩对线路绝缘子附近空间电场的影响。结果表明:随着伞裙直径的增加,硅橡胶防鸟罩所受的风压增加,在伞裙边缘形成的弯矩也相应增大,更易出现大幅度摆动,在大风作用下易发生伞裙撕裂。新型硅橡胶防鸟罩对绝缘子低压端局部场强分布具有改善作用,能满足输电线路防鸟害技术需求。
The silicone rubber bird shield for high voltage transmission lines can effectively avoid flashover fault of insulator string caused by droppings, but it is probably torn up in strong winds. In order to study the wind resistance performance of silicone rubber bird shields for transmission lines of different voltage grades, the flow field around the insulator was simulated by the finite element simulation software ANSYS Workbench. A new type silicone rubber bird shield with metallic framework was designed,and the effect of the new bird shield with different size on the space electric field around the insulator was simulated and analyzed. The results show that with the increase of the diameter of umbrella skirt,the wind pressure on the silicone rubber bird shield increases, and the bending moment at the edge of umbrella skirt increases correspondingly, making the bird shield easier to swing sharply, so that the umbrella skirt is easy to be torn up under high winds. The new type silicone rubber bird shield can improve the local electric field intensity distribution at the low voltage end of insulator, and can meet the requirement of protecting transmission lines from birds.
作者
马博翔
伍弘
MA Boxiang;WU Hong(Cable Branch o f State Grid Beijing Electric Power Company,Beijing 100022,China;Electric Power Research Institute o f State Grid Ningxia Electric Power Co.,Ltd.,Yinchuan 750011,China)
出处
《绝缘材料》
CAS
北大核心
2020年第4期64-69,共6页
Insulating Materials
基金
国网宁夏电力有限公司科技项目(5229DK15000W)。
关键词
硅橡胶
防鸟罩
流场仿真
抗风性能
金属骨架
空间电场
silicone rubber
bird shield
flow field simulation
wind resistance performance
metallic framework
space electric field
