间插布置方式对交流绝缘子串覆冰特性影响.PDF

20 11 年 1 月 电 工 技 术 学 报 Vol.26 No. 1 第 26 卷第 1 期 TRAN SACTION S OF CHINA ELECTROTECHNICAL SOCIETY Jan . 20 11 间插布置方式对交流绝缘子串覆冰特性影响 张志劲 蒋兴良 胡建林 孙才新 （重庆大学输配电装备及系统安全与新技术国家重点实验室 重庆 400044） 摘要 间插布置方式 以提高绝缘子冰闪电压，本文通过实验验证了覆冰绝缘子串电场仿 真计算模型，并在此基础上分析研究了大盘径绝缘子的直径和绝缘子串中间插绝缘子位置对绝 缘子串电场分布的影响。研究结果表明 ：间插布置方式下覆冰绝缘子串电压分布发生严重畸变， 但比标准绝缘子串下的最大电压分布小 ；采用“3+ 1”和“4+ 1” 间插布置方式且大盘径绝缘子的盘 径比参考盘形悬式绝缘子大 100～150mm ，具有较好的防冰效果 ；试验结果表明合理的间插 布置方式 以提高覆冰绝缘子串交流冰闪电压 15%～20%。 关键词：覆冰 交流 绝缘子串 间插布置 电场模型 电场分布 中图分类号：TM852 Influence of the Type of Insulators Connected With Alternately Large and Small Diameter Sheds on AC Icing Flashover Performance Zhang Zhij in J iang X ing liang H u J ianlin Sun Caix in （State Key Laboratory of Power Transmission Equipment System Security and New Technology Chongqing University Chongqing 400044 China ） Abstract Using the type of iced insulators connected with alternately large and small diameter sheds (CALSDS) can improve icing flashover voltage. The electric field model of ice-covered insulator string is put forward and validated by experiment tests in this paper, furthermore, the influence of the diameter of insulators with large sheds and the type of CALSDS on the electric field strength distribution is discussed. The research results show that : the potential distribution of icing insulator string with CALSDS may change greatly, whereas is lower than that with normal collocation ; the effect of preventing icing is obvious using the type of CALSDS with “3+ 1” and “4+ 1” and the diameter of insulators with large sheds which is larger 100～150mm than that of normal insulator ; the icing flashover voltage can be improved about fiftee