Suzhou Electric Appliance Research Institute
期刊號: CN32-1800/TM| ISSN1007-3175

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220 kV同塔雙回線路雷擊閃絡(luò)故障分析

來源:電工電氣發(fā)布時間:2020-04-18 14:18 瀏覽次數(shù):955
220 kV同塔雙回線路雷擊閃絡(luò)故障分析
 
徐文玲1,周路遙2
(1 中鐵武漢電氣化局集團(tuán)上海分公司,上海 201713;2 國網(wǎng)浙江省電力有限公司電力科學(xué)研究院,浙江 杭州 310014)
 
    摘 要:對某220 kV同塔雙回線路雷擊閃絡(luò)故障進(jìn)行分析。根據(jù)故障巡視情況、雷電信息數(shù)據(jù)、故障錄波情況、ATP-EMTP暫態(tài)仿真分析可綜合判定本次雙回同跳故障為雷電反擊造成,具體過程為:雷電擊中75#塔頂或相鄰地線,雷電流由桿塔接地裝置注入大地,導(dǎo)致75# 桿塔塔頂及塔身電位升高,在雙回線路的B、C兩相形成反擊過電壓,引起絕緣子串閃絡(luò)并發(fā)生線路同跳。提出根據(jù)線路通道的雷害評估結(jié)果來實(shí)施防雷整改,通過安裝線路避雷器及在桿塔下方架設(shè)耦合地線的改造措施,顯著提高了線路耐雷水平。
    關(guān)鍵詞:線路同跳;反擊;雷電信息數(shù)據(jù);故障錄波;ATP-EMTP
    中圖分類號:TM863     文獻(xiàn)標(biāo)識碼:B     文章編號:1007-3175(2020)04-0048-04
 
Analysis of Lightning Flashover Fault on 220 kV Double Circuit Transmission Lines on the Same Tower
 
XU Wen-ling1, ZHOU Lu-yao2
(1 Wuhan Railway Electrification Bureau Group Shanghai Subsidiary, Shanghai 201713, China;
2 Electric Power Research Institute of State Grid Zhejiang Electric Power Co., Ltd, Hangzhou 310014, China)
 
    Abstract: The lightning flashover failure of a 220 kV double-circuit transmission line is analyzed. According to the fault inspection situation, lightning information data, fault recording conditions, and ATP-EMTP transient simulation analysis, it can be comprehensively determined that the case of simultaneous tripping of double circuit lines was caused by lightning counterattack. The specific process is: the lightning hits 75 # tower top or adjacent ground line, lightning current is injected into the ground by the pole grounding device, which causes the potential of the tower top and tower body of 75 # rising, and counterattack over-voltage is formed in the B and C phases of the double-circuit line, causing the insulator string flashover and line trip. It is proposed to implement the lightning protection rectification based on the results of the lightning damage assessment of the line channel, and the lightning protection level of the line was significantly improved by the installation of line lightning arresters and the reconstruction measures of coupling ground lines under the tower.
    Key words: simultaneous trip-out; counterattack; lightning information data; fault recording; ATP-EMTP
 
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