高压电网绝缘子在线绝缘性能的多级模糊综合评判  

Multilevel Fuzzy Comprehensive Evaluation of On-Line Insulation Performance of High Voltage Insulators

作　　者：李波[1] 刘念[1] 王秀婕[1] 

机构地区：[1]四川大学电气信息学院,四川省成都市610065

出　　处：《电网技术》2007年第15期75-79,共5页Power System Technology

摘　　要：对绝缘子在线检测到的数据利用模糊综合评判的方法进行处理,除对泄漏电流峰值、泄漏电流有效值、脉冲电流频度进行模糊化处理以外,还利用曲线拟合的方法对泄漏电流奇次谐波和脉冲电流峰值进行模糊化处理。在构建模糊关系矩阵时,用偏大型半梯形分布引入了相对湿度因子,使得在计算过程中充分考虑天气的影响。从而得到绝缘子的在线绝缘性能和检修建议并通过现场试验数据验证了该方法的可行性。By means of multilevel fuzzy comprehensive evaluation, the measured on-line data of insulators is processed, thus both on-line insulation performance of insulators and the suggestion on insulator overhaul are obtained. The feasibility of this method is verified by on-site testing data. Not only the fuzzified processing of peak value of leakage current and virtual value of leakage current as well as the scale-frequency of pulse current are conducted, but also the fuzzified processing of odd harmonics in leakage current and peak value of pulse current are conducted by curve fitting. During the construction of fuzzy relation matrix, by means of tend-to-large half-trapezoidal distribution the relative humidity factor is led in, thus the weather effect can be adequately taken into account during the computation.

关 键 词：绝缘子 泄漏电流 脉冲电流 模糊综合评判 高电压技术 

分 类 号：TM855[电气工程—高电压与绝缘技术] TM216[一般工业技术—材料科学与工程]