电工技术学报  2016, Vol. 31 Issue (12): 72-79    DOI:
高电压与绝缘 |
基于理、化、电特性的110kV XLPE绝缘电缆剩余寿命的综合评估
刘刚1, 刘斯亮1, 金尚儿1, 黄嘉盛2
1. 华南理工大学电力学院 广州 510640;
2. 广州供电局有限公司输电所 广州 510310
Comprehensive Evaluation of Remaining Life of 110kV XLPE Insulated Cable Based on Physical,Chemical and Electrical Properties
Liu Gang1, Liu Siliang1, Jin Shanger1, Huang Jiasheng2
1. South China University of Technology Guangzhou 510640 China;
2. Guangzhou Power Supply Bureau Co. Ltd Guangzhou 510310 China
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摘要 为了准确判断110kV交联聚乙烯绝缘电缆的老化状况,并对电缆的剩余寿命进行评估,引入逐级耐压法、热老化法及活化能法,从宏观、微观两个方面入手分析了电缆在老化过程中理、化、电特性的变化规律。结果表明,电缆运行过程中,最高运行电压环境、负载加大以及温度升高会明显降低电缆的剩余寿命,降低量约为60%~70%;同时,交联聚乙烯材料的活化能表现出整体下降的趋势。综合各试验可评估1985年投入运行的日本住友电缆、1985年投入运行的日本古河电缆、1996年投入运行的日本住友电缆的剩余寿命分别约为10年、20年、20年~30年,评估结果与预期相符,根据电缆的多项老化指标进行寿命的综合评估具有准确性与可靠性,对线路改造与电网规划有重要的指导意义。
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关键词 110kV交联电缆逐级耐压热老化活化能寿命综合评估    
Abstract:Gradual voltage endurance method, thermal aging method and activation energy method are introduced to assess the aging condition of 110kV XLPE insulated cable accurately. They focus on analysing cable’s physical, chemical and electrical properties from both macro-and micro-aspects. The results show that highest running voltage, over-load and increased temperature can obviously reduce the remaining life of cable with the reduction of about 60%~70%. Besides, the activation energy of XLPE declines on the whole. Synthesizing indicators of all the tests shows that the remaining life of the Japanese Sumitomo Seika cables put into operation in 1985, the Japanese Furukawa cables put into operation in 1985 and the Japanese Sumitomo Seika cables put into operation in 1996 is 10 years, 20 years and 20~30 years. This results are in line with expectation. Comprehensive evaluation of cable’s life has better accuracy and reliability, which has important guiding significance on line transformation and power network planning.
Key words110kV XLPE cable    gradual voltage endurance    thermal aging    activation energy    comprehensive evaluation of life   
收稿日期: 2014-08-13      出版日期: 2016-07-12
PACS: TM247  
基金资助:国家高技术研究发展计划(863计划)资助项目(2015AA050201)
作者简介: 刘 刚 男,1969年生,博士,副教授,硕士生导师,国际电气电子工程协会(IEEE)会员,研究方向为智能高压电网、过电压及其防护、电力设备外绝缘等。E-mail: liugang@scut.edu.cn金尚儿 男,1988年生,硕士研究生,研究方向电力电缆在线监测及故障诊断。E-mail: jinshangerok@163.com
引用本文:   
刘,刚, 刘斯亮, 金尚儿, 黄嘉盛. 基于理、化、电特性的110kV XLPE绝缘电缆剩余寿命的综合评估[J]. 电工技术学报, 2016, 31(12): 72-79. Liu Gang, Liu Siliang, Jin Shanger, Huang Jiasheng. Comprehensive Evaluation of Remaining Life of 110kV XLPE Insulated Cable Based on Physical,Chemical and Electrical Properties. Transactions of China Electrotechnical Society, 2016, 31(12): 72-79.
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