Suzhou Electric Appliance Research Institute
期刊號(hào): CN32-1800/TM| ISSN2097-6623

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110 kV輸電線路復(fù)合絕緣子故障分析

來源:電工電氣發(fā)布時(shí)間:2026-01-26 09:26 瀏覽次數(shù):0

110 kV輸電線路復(fù)合絕緣子故障分析

張睿清1,葉昊亮2,丁同臻3,敬強(qiáng)3,孫亦愷4,陶瑞祥2,趙璐旻2
(1 國網(wǎng)浙江省電力有限公司杭州市余杭區(qū)供電公司,浙江 杭州 311100;
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;
3 國網(wǎng)浙江省電力有限公司舟山供電公司,浙江 舟山 316021;
4 臺(tái)州學(xué)院 智能制造學(xué)院,浙江 臺(tái)州 318000)
 
    摘 要:在復(fù)雜的戶外工作環(huán)境下,尤其是南方沿海地區(qū)的輸電線路上,由于污穢爬電、高溫高濕、護(hù)套老化等因素影響,部分復(fù)合絕緣子存在表面積污、傘裙硬化與脆化、護(hù)套受損等缺陷。結(jié)合同一條 110 kV 輸電線路相鄰桿塔發(fā)生的兩起絕緣子擊穿事件,對(duì)線路絕緣子進(jìn)行了外觀檢查、憎水性測(cè)試、鹽密測(cè)試、水?dāng)U散試驗(yàn)、耐漏電起痕試驗(yàn)及剖檢,分析了復(fù)合絕緣子的放電閃絡(luò)原因與擊穿過程。結(jié)果表明,兩處復(fù)合絕緣子均處于沿海鹽霧環(huán)境,護(hù)套材料耐漏電起痕能力下降,在表面泄漏電流作用下逐步發(fā)生電蝕,破壞護(hù)套、芯棒外露,隨著時(shí)間發(fā)展,缺陷長度增長,最終導(dǎo)致?lián)舸=o出了后續(xù)沿海輸電線路復(fù)合絕緣子的運(yùn)維意見。
    關(guān)鍵詞: 復(fù)合絕緣子;界面擊穿;放電閃絡(luò);沿海輸電線路;鹽霧環(huán)境
    中圖分類號(hào):TM216 ;TM726     文獻(xiàn)標(biāo)識(shí)碼:B     文章編號(hào):2097-6623(2026)01-0051-05
 
Composite Insulators Fault Analysis in 110 kV Transmission Line
 
ZHANG Rui-qing1, YE Hao-liang2, DING Tong-zhen3, JING Qiang3, SUN Yi-kai4, TAO Rui-xiang2, ZHAO Lu-min2
(1 State Grid Zhejiang Electric Power Co.,Ltd. Hangzhou Yuhang District Power Supply Company, Hangzhou 311100, China;
2 State Grid Zhejiang Electric Power Co.,Ltd. Electric Power Research Institute, Hangzhou 310014, China;
3 State Grid Zhejiang Electric Power Co.,Ltd. Zhoushan Power Supply Company, Zhoushan 316021, China;
4 School of Intelligent Manufacturing, Taizhou University, Taizhou 318000, China)
 
    Abstract: In complex outdoor working environments, especially on transmission lines in the southern coastal areas, due to factors such as contamination and creepage, high temperature and humidity, and aging of the sheath, some composite insulators have defects such as surface contamination, hardening and embrittlement of the umbrella skirt, and damage to the sheath. In this paper, based on two insulator breakdown events that occurred on adjacent towers of the same 110 kV transmission line, the line insulators were subject to appearance inspection, hydrophobicity test, salt density test, water diffusion test, tracking resistance test and profile inspection.The causes of discharge flashover and breakdown process of the composite insulators were analyzed. The results show that both composite insulators are in a coastal salt spray environment,the resistance of the sheath material to leakage tracking decreases. Under the action of surface leakage current, electrical erosion gradually occurs, damaging the sheath and exposing the core rod. With the passage of time, the defect length increases, eventually leading to breakdown. The operation and maintenance opinions for the subsequent composite insulators of coastal transmission lines were provided.
    Key words: composite insulator; interface breakdown; discharge flashover; coastal transmission line; salt spray environment
 
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