装配避雷器的同塔混压四回输电线路反击防雷性能分析
曹飞，王阳，杨剑
（义乌市供电有限公司，浙江 义乌 322000）
摘 要：针对1 000 kV/500 kV同塔混压四回线路易受雷击发生反击跳闸问题。基于PSCAD/EMTDC仿真软件，在考虑工频电压的影响下建立绝缘子闪络模型、杆塔多波阻抗模型等电力元件仿真模型，并对线路的反击耐雷水平进行了仿真分析。对输电线路绝缘子易闪络相加装线路避雷器，计算线路避雷器不同位置下线路的耐雷水平和雷击跳闸率。计算结果表明同塔多回混压线路非全相安装避雷器时，防雷效果与避雷器安装位置密切相关。对于绝缘子易闪络相加装避雷器，只在同压同相装设避雷器的情况下，建议在1 000 kV两回A 相各装一只避雷器。对同塔四回混压易闪络相均装设避雷器，防雷效果最佳。
关键词：同塔四回；耐雷水平；反击跳闸率
中图分类号：TM862 文献标识码：A 文章编号：1007-3175(2019)01-0030-04
Beat Back Anti-Thunder Performance Analysis of Quadruple Electric Transmission
Line with Mixed Voltage in the Same Tower for Assemble Arrester
CAO Fei, WANG Yang, YANG Jian
（Yiwu Power Supply Limited Company, Yiwu 322000, China）
Abstract: Aiming at the problem of beat back trip-out since the 1 000 kV/500 kVquadruple electric transmission line is liable to lightning, based on the simulation software PSCAD/EMTDC, this paper built an insulator arc-over model and tower multiwave impedance model etc electric power element simulation models in consideration of power frequency voltage impacts, and simulated and analyzed the beat back lightning withstand level. The line gap was added to the electric transmission line for the easy flashover phase of insulator and the lightning withstand level and the lightning trip-out rate were calculated in different location of the arrester. The calculation results show that when the arresters were not completely installed in all phases of the multiple electric transmission line with mixed voltage in the same tower, the antithunder effect is closely related to the installation site of the arrester. For the easy flashover of the insulator, the arrester is added under the condition of the same voltage and the same phase. It is suggested that the two 1 000 kV circuits should be installed an arrester at each side. That the easy flashover phases of quadruple electric transmission line with mixed voltage in the same tower are all installed the arresters will have the best effectiveness.
Key words: four circuits in the same tower; lightning withstand level; beat back trip-out rate
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