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

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一起雙回35 kV輸電線(xiàn)路同跳故障分析

來(lái)源:電工電氣發(fā)布時(shí)間:2025-05-27 15:27瀏覽次數(shù):9

一起雙回35 kV輸電線(xiàn)路同跳故障分析

楊勇1,葉昊亮1,馬勛2,李特1,馬鈺1,何堅(jiān)1
(1 國(guó)網(wǎng)浙江省電力有限公司電力科學(xué)研究院,浙江 杭州 310014;
2 國(guó)網(wǎng)浙江省電力有限公司舟山供電公司,浙江 舟山 316000)
 
    摘 要:基于一起雙回 35 kV 輸電線(xiàn)路同跳故障,結(jié)合現(xiàn)場(chǎng)錄波文件、避雷器解體檢查和同類(lèi)型排查及海纜故障定位給出了故障發(fā)展全過(guò)程分析,并在電磁暫態(tài)仿真軟件 PSCAD/EMTDC 中建立對(duì)應(yīng)模型進(jìn)行過(guò)電壓計(jì)算。結(jié)果表明:Ⅰ 線(xiàn) 1 號(hào)塔 B 相電纜終端避雷器內(nèi)部受潮和 Ⅱ 線(xiàn)海纜 A 相存在的絕緣缺陷,是導(dǎo)致此次雙線(xiàn)同停故障的主要原因。后續(xù)建議對(duì)同批次避雷器予以逐步退運(yùn)處理,并進(jìn)一步加強(qiáng) 35kV 海纜接頭制作規(guī)范和防止海纜錨害技術(shù)措施。
    關(guān)鍵詞: 海底電纜;混合線(xiàn)路;短路故障;避雷器
    中圖分類(lèi)號(hào):TM762.2+5 ;TM862     文獻(xiàn)標(biāo)識(shí)碼:B     文章編號(hào):1007-3175(2025)05-0049-08
 
Analysis of Co-Hopping Faults on a Double-Circuit
35 kV Transmission Line
 
YANG Yong1, YE Hao-liang1, MA Xun2, LI Te1, MA Yu1, HE Jian1
(1 State Grid Zhejiang Electric Power Research Institute, Hangzhou 310014, China;
2 Zhoushan Power Supply Company of State Grid Zhejiang Electric Power Co., Ltd, Zhoushan 316000, China)
 
    Abstract: Based on a double-circuit 35 kV transmission line co-hopping fault, combined with on-site wave recording files, arrester disassembly inspection and same type troubleshooting, and submarine cable fault location, the entire process of fault development is analyzed,and the corresponding model is established in the electromagnetic transient simulation software PSCAD/EMTDC for the over-voltage calculation.The results show that moisture inside the arrester of phase B cable terminal of tower 1 of line I and insulation defects in phase A of the submarine cable of line II are the main reasons for this double-line simultaneous outage failure. Subsequently, it is recommended that the same batch of arresters should be gradually withdrawn from shipment, and further strengthen the 35 kV submarine cable joints production specifications and technical measures to prevent the anchor damage of submarine cables.
    Key words: submarine cable; hybrid line; short circuit fault; arrester
 
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