Flashover Performance of 220 kV Composite Insulators under Icing Conditions
Composite insulators are widely used in modern power systems to provide electrical insulation and mechanical support for transmission lines and substations.However,the insulation strength will decrease greatly under the combined conditions of ice-covering and pollution and flashover may take place under these serious conditions.Thus,it has great significance for the power systems safe and stable operation to study the icing flashover performance of composite insulators.In this paper,AC flashover tests of different artificially ice-covered 220 kV composite insulators are carried out in a multi-function artificial climate chamber,the icing process,50%flashover voltage of the tested insulators are obtained.The effects of the booster sheds and zinc oxide(ZnO)resistors on the composite insulators icing flashover voltages are discussed according to the tested results.The work done in this paper can provide reference for the design of outdoor composite insulators in cold climate regions.
composite insulators icing conditions artificial climate chamber AC flashover performances
XIE Pengkang LU Jiazheng JIANG Zhenglong FANG Zhen
State Key Laboratory of Disaster Prevention & Reduction for Power Grid Transmission and Distribution Equipment State Grid Hunan Electric Power Corporation Disaster Prevention & Reduction Center Changsha,China
国际会议
重庆
英文
1-6
2017-09-25（万方平台首次上网日期，不代表论文的发表时间）