1.国家电网有限公司华中分部 湖北 武汉;2.南瑞集团有限公司 江苏 南京;3.北京科东电力控制系统有限责任公司 北京 海淀;4.长沙理工大学 电气与信息工程学院 湖南 长沙
1.Central China Branch of State Grid Corporation of China;2.NARI Group Corporation;3.Beijing Kedong Electric Power Control System Co,Ltd;4.School of Electrical and Information Engineering,Changsha University of Science and Technology
In view of the insulation fault of transmission lines, passive maintenance and prevention are mostly adopted, which can not realize the problem of early warning. In this paper, a power line insulation fault early warning system based on fuzzy theory is proposed. The mechanism of insulator deterioration, pollution flashover and traveling wave generation is analyzed. And the characteristic is concluded: The more serious the insulation deterioration, the greater the amplitude and the shorter the period. According to the characteristic, the fuzzy theory is used to realize the early warning. The amplitude and time interval of the fault traveling wave are taken as the input, and the degree of fault warning is taken as the output. Moreover, the fuzzy relation are determined to establish the fuzzy rule base. Secondly, based on the basic principle of fuzzy algorithm, the amplitude and time interval of traveling wave are input signals. The fuzzy rule base is established by the relationship of insulation fault degree, so as to realize fuzzy early warning. The field test results show that: the power line insulation fault early warning system has high identification sensitivity, can accurately predict the insulation performance of the line insulator.