裝配避雷器的同塔混壓四回輸電線路反擊防雷性能分析
曹飛，王陽，楊劍
（義烏市供電有限公司，浙江 義烏 322000）
摘 要：針對1 000 kV/500 kV同塔混壓四回線路易受雷擊發生反擊跳閘問題。基于PSCAD/EMTDC仿真軟件，在考慮工頻電壓的影響下建立絕緣子閃絡模型、桿塔多波阻抗模型等電力元件仿真模型，并對線路的反擊耐雷水平進行了仿真分析。對輸電線路絕緣子易閃絡相加裝線路避雷器，計算線路避雷器不同位置下線路的耐雷水平和雷擊跳閘率。計算結果表明同塔多回混壓線路非全相安裝避雷器時，防雷效果與避雷器安裝位置密切相關。對于絕緣子易閃絡相加裝避雷器，只在同壓同相裝設避雷器的情況下，建議在1 000 kV兩回A 相各裝一只避雷器。對同塔四回混壓易閃絡相均裝設避雷器，防雷效果最佳。
關鍵詞：同塔四回；耐雷水平；反擊跳閘率
中圖分類號：TM862 文獻標識碼：A 文章編號：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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