Effect of inverted T arrangement on AC pollution flashover characteristics of insulator strings

作     者：Xingliang Jiang Xiaodong Ren Han Wang Xingbo Han Conglai Bi Zhiyu Li Ledong Hou 

作者机构：State Key Laboratory of Power Transmission Equipment and System Security and New TechnologyCollege of Electrical EngineeringChongqing UniversityShapingba DistrictChongqing400044People's Republic of China 

出 版 物：《High Voltage》 (高电压（英文）)

年 卷 期：2019年第4卷第2期

页      面：97-104页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：the National Natural Science Foundation of China(grant no.51637002) 

主　　题：arrangement string pollution 

摘      要：The arrangement of insulator strings has an effect on its pollution flashover characteristics.A new arrangement of insulator strings,inverted T-type arrangement,is proposed in this *** electric field distribution is simulated and the pollution flashover characteristics are tested in an artificial climate *** test results indicate that the inverted T-type arrangement can greatly improve the flashover voltage of polluted insulator strings,the‘7+2’inverted T-type arrangement can increase the flashover voltage of each insulator by 8.5%on average,and the‘3+3’inverted T-type arrangement can increase the flashover voltage of each insulator by 13.4%.The discharge process is different from that of the normal suspension string when the insulator string is inverted T-shaped,i.e.a local arc is produced at the low voltage end of the insulator string and develops downward along the suspension *** as for the horizontal tension string parts,it is difficult to generate arc during discharge development.