李岩松,李世延,仇仔来,金虎,刘云鹏.GIS绝缘子表面固定金属颗粒放电特性研究[J].电测与仪表,2014,51(15):. Li Yan-song,Li Shi-yan,Qiu Zi-lai,jinhu,Liu Yun-peng.Study of discharge characteristics of fixed metal particles on the GIS insulator surface[J].Electrical Measurement & Instrumentation,2014,51(15):.
GIS绝缘子表面固定金属颗粒放电特性研究
Study of discharge characteristics of fixed metal particles on the GIS insulator surface
For studying the discharge characteristics of fixed metal particles on the basin insulator surface of GIS, a 220kV GIS partial discharge detection platform is taken to simulate discharge model of fixed metal particles on GIS insulator surface, and uses the ultraviolet imaging technology, ultrasonic testing technology and pulse current method are mainly used to detect the whole discharge process. Based on data analysis, the following conclusions can be concluded: 1) Ultraviolet imaging technology is highly sensitive, and the number of UV photons can directly reflect the discharge intensity. 2) The shape of fixed metal particles on the insulator surface have a great impact on discharge intensity. 3) In the basin insulator defects, collisions between charged particle become more intense with discharge intensifing. The collisions result in the increase of sound pressure in macro level, and lead to ultrasonic signal increasing.
