EFFECT OF COMPOSITE ASSISTANT SHED ON THE FLASHOVER PERFORMANCE OF ICE-COVERED STATION POST INSULATORS

摘要：

In order to analyze the effect of Composite Assistant Shed (CAS) on icing flashover characteristics of post insulators, some characteristics of energized 500kV post insulators with and without CAS were studied by icing test in a large-scale artificial climate chamber. The difference of appearance of ice, flashover voltage, envelopment of leakage current and discharge path between post insulators with CAS and without ones were presented and analyzed in this paper. Test results demonstrated that the CAS can decelerate icicle developing on the insulators and the sheds will not been bridged by icicle, which result in discharge path mainly along to the icicle and air gaps. Due to the composite antipollution shed, on the condition of seriously iced and polluted, the flashover voltage of 500kV station post insulators is higher than the maximum running phase to earth voltage, which is distinctly higher than normal post insulators.

作者: Xu Tao Xu Zuoming Wan Qifa Chen Yong Liu Yunpeng Yao Tao Shi Yan

作者单位: State Grid Electric Power Research Institute of SGCC, Wu Han 430074, China

会议类型: 国际会议

会议名称: The 14th International Workshop on Atmospheric Icing of Structures(第十四届结构物大气覆冰国际研讨会 IWAIS 2011)

会议地点: 重庆

会议语种:英文

页码: 49

在线出版日期: 2011-05-08（万方平台首次上网日期，不代表论文的发表时间）