Li Zuosheng1, Yao Jiangang1, Yang Yingjian2, Chen Fang1, Jin Yongshun1, Miao Zengqiang3
1. Hunan University Changsha 410082 China 2. State Grid Electric Power Research Institute Wuhan 430074 China 3. Hunan HDHL Electrical & Information Tech Co. Ltd Changsha 410012 China
Abstract:As the existing heating models of insulators could not solve the problem of the presence of dry band or dry band arc on the insulator surface, a heating analytical method of polluted and wetted insulators is proposed on the assumption that water evaporation mainly depends on heat generation on the insulator surface. By introducing contamination layer surface resistivity, humid intensity and arc model, the judging condition of the generation of dry band or dry band arc and the heating model for each running state are developed and solved by numerical analysis method. The simulation results reveal the thermal distribution on the insulator surface and the impact of the presence of dry band or dry band arc on leakage current and heating. Infrared thermal imaging experiment results of polluted and wetted insulators indicate that the proposed model is reasonable and valuable for establishment of pollution model in theory.
李佐胜, 姚建刚, 杨迎建, 陈芳, 金永顺, 苗增强. 湿污绝缘子发热模型[J]. 电工技术学报, 2009, 24(7): 21-27.
Li Zuosheng, Yao Jiangang, Yang Yingjian, Chen Fang, Jin Yongshun, Miao Zengqiang. Heating Model of Polluted and Wetted Insulators. Transactions of China Electrotechnical Society, 2009, 24(7): 21-27.