輸電線路參數(shù)對桿塔分流系數(shù)的影響研究
李牧軒1,丘文彪1,田中天2,嚴(yán)小敏2
(1 廣東電網(wǎng)有限責(zé)任公司梅州供電局,廣東 梅州 514000;
2 武漢三相電力科技有限公司,湖北 武漢 430070)
摘 要:桿塔分流系數(shù)是決定輸電線路反擊耐雷水平的重要因素,輸電線路自身參數(shù)對桿塔分流系數(shù)的影響不可忽視?;诙嗖ㄗ杩鼓P停?ATP-EMTP 軟件對不同接地電阻、桿塔呼高、線路檔距下的桿塔分流系數(shù)進(jìn)行仿真分析,結(jié)果表明接地電阻與線路檔距對分流系數(shù)有明顯的影響,是在防雷計算中需要考慮的因素。
關(guān)鍵詞: 輸電線路;桿塔分流系數(shù);防雷;接地電阻
中圖分類號:TM726 ;TM863 文獻(xiàn)標(biāo)識碼:A 文章編號:1007-3175(2022)08-0027-04
Research on the Influence of Transmission Line Parameters on the
Shunted Coefficient of Tower Pole
LI Mu-xuan1, QIU Wen-biao1, TIAN Zhong-tian2, YAN Xiao-min2
(1 Meizhou Power Supply Bureau of Guangdong Power Grid Co., Ltd, Meizhou 514000, China;
2 Wuhan Sunshine Power Science & Technology Co., Ltd, Wuhan 430070, China)
Abstract: The shunted coefficient of tower poles is a decisive factor in the lightning back-flashover of the transmission line, and the parameters of the transmission line have an assignable influence on the shunted coefficient of tower poles. Based on the multi-wave impedance model, this research employed the ATP-EMTP software to do the simulation analysis of the shunted coefficient of tower poles from various grounding resistance, nominal heights, and line span. The result shows grounding resistance and line span have to be considered in lighting protection calculation because they have obvious effects on the shunted coefficient.
Key words: transmission line; shunted coefficient of tower pole; lightning protection; grounding resistance
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