220kV同塔双回输电线路复合绝缘子的操作和雷电冲击放电特性

发布时间：2019-06-22 15:40

【摘要】：在我国南方多雷地区,高压输电线路上运行的复合绝缘子常发生雷击跳闸事故,分析认为主要原因是个别地段复合绝缘子干弧距离配置不足导致雷电耐压偏低。为此,采用220 kV同塔双回输电线路杆塔模拟真型塔窗,安装模拟导线,分别对上、中、下相不同干弧距离的复合绝缘子进行了操作冲击和雷电冲击试验,统计分析给出了50%放电电压数据和拟合曲线。研究结果表明:复合绝缘子干弧距离每增加0.15 m,操作冲击50%放电电压就增加54~65 kV,雷电冲击50%放电电压增加80~84 kV;带模拟塔窗情况下复合绝缘子单位干弧距离的雷电冲击50%放电电压比不带塔窗仅有横担情况下约高5.6%。研究结论可为输电线路特别是多雷区输电线路的复合绝缘子选型提供参考。
[Abstract]:Lightning trip accidents often occur in composite insulators running on high voltage transmission lines in the lightning area of southern China. It is considered that the main reason is that the lack of dry arc distance configuration of composite insulators in individual areas leads to the low lightning withstand voltage. For this reason, 220 kV double circuit transmission line tower is used to simulate the true tower window, and the simulated conductors are installed. The operation shock and lightning shock tests are carried out on the composite insulators with different dry arc distances in the upper, middle and lower phases, and the 50% discharge voltage data and fitting curves are given statistically. The results show that for every increase of 0.15m in the dry arc distance of the composite insulator, the 50% discharge voltage of the operating shock increases by 54 脳 65 kV, lightning impulse 50% discharge voltage increases 80 脳 84 kV; with simulated tower window, and the lightning impulse 50% discharge voltage of the composite insulator unit dry arc distance is about 5.6% higher than that without the tower window. The research results can provide a reference for the selection of composite insulators for transmission lines, especially for transmission lines in multi-minefield areas.
【作者单位】：清华大学深圳研究生院;南方电网公司物资部;武汉大学电气工程学院;中国电力科学研究院;广东电网公司佛山供电局;
【基金】：国家重点基础研究发展计划(973计划)(2009CB724503) 广东电网公司科技项目~~
【分类号】：TM216

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