Icing Flashover Characteristics of UHV AC New-type Insulator String
Insulator string is an important component of UHV AC transmission lines,which is playing an important role in electrical insulation and mechanical support.The electrical performance of the insulators under freezing conditions is an important basis for the selection of external insulation of transmission lines in icing regions of China.The new type insulator strings have achieved the optimization of the wire suspension mode and the performance of the insulator string by changing the string structure,which is of great practical value for the special sections with high corridor cleaning fees,such as the Y-type string and the inverted V-type string,which is in a position to compress the length of cross-arm and raise the height of the conductor.In this paper,icing flashover experiments were carried out in a large artificial climate chamber at UHV AC test base of State Grid Corporation of China by conducting experimental study on the characteristics of icing flashover used in new-type stings such as Y-shape string,the inverted V-shape string and I-shape string under the conditions of glaze and mixed glaze,the parameter of which has been proposed to be recommended in the insulation design scheme of the new Y-shape string,inverted V-shape and porcelain-composite insulator combination string for the UHV AC transmission line in China,and it is also proposed the configuration methods of icing flashover of different insulator strings.The research results can be applied to the string design of UHV insulator string and the method of icing insulation,so as to realize the gradual application and popularization of the new type insulator string in the following UHV projects and improve the insulation characteristics of the insulator strings.
insulator string new type Y-shape string inverted V-shape string icing flashover
GAO Jingrong NAN Jing WAN Xiaodong HUO Feng XU Tao CAI Lin LI Xuelin LI Jin
Guangzhou pumped storage power station Guangzhou,China China Electric Power Research Institute Wuhan,China
国际会议
重庆
英文
1-4
2017-09-25（万方平台首次上网日期，不代表论文的发表时间）