| 福建沿海某区域10kV架空绝缘导线失效分析 |
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| 引用本文： | 陈云翔,蔡建宾,林德源,庄建煌,江祖瑄,黄伟林,邵艳群.福建沿海某区域10kV架空绝缘导线失效分析[J].工程塑料应用,2017,45(3). |
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| 作者姓名： | 陈云翔 蔡建宾 林德源 庄建煌 江祖瑄 黄伟林 邵艳群 |
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| 作者单位： | 1. 国网福建省电力有限公司电力科学研究院,福州,350007;2. 国网福建省电力有限公司莆田供电公司,福建莆田,351100;3. 福州大学材料学院,福州,350108 |
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| 基金项目： | 国家自然科学基金项目,福建沿海区域电网设备腐蚀机理及综合治理技术研究 |
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| 摘 要： | 通过宏观拍照、傅立叶变换红外光谱(FTIR)、热重(TG)分析和扫描电子显微镜(SEM)等方法详细分析了福建省沿海某区域雷击烧蚀的部分失效样品,使用有限元分析方法分析了绝缘子负荷侧的受力情况。结果表明,失效样品主要表现出断链,氧化老化较少。炭黑量过多会使绝缘层过早失效。绝缘子负荷侧存在最大的应力和应力变形,使得设计上"先天不足"架空绝缘导线在电弧电流产生的堆积热量和应力作用下力学性能降低,产生大量裂纹。绝缘材料本身避免"绝缘薄弱处"是从根本上真正提高架空绝缘导线寿命的关键。
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| 关 键 词： | 架空绝缘导线 失效 老化 有限元分析 |
Failure Analysis on 10 kV Overhead Insulated Conductors from A Certain Area of Fujian Coast |
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| Chen Yunxiang,Cai Jianbin,Lin Deyuan,Zhuang Jianhuang,Jiang Zuxuan,Huang Weilin,Shao Yanqun.Failure Analysis on 10 kV Overhead Insulated Conductors from A Certain Area of Fujian Coast[J].Engineering Plastics Application,2017,45(3). |
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| Authors: | Chen Yunxiang Cai Jianbin Lin Deyuan Zhuang Jianhuang Jiang Zuxuan Huang Weilin Shao Yanqun |
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| Abstract: | The failure samples of lightning strike from a certain area of Fujian coast were analyzed in detail by the macro photography,FTIR,TG and SEM. The stress conditions on the load side of insulator were analyzed using the finite element analysis. It's shown that failure samples mainly show the broken chain and less oxidative aging. The excessive amount of carbon black can make insulated layer untimely failure. The insulator load side exist the biggest stress and deformation. The intrinsic shortcomings of overhead insulated conductor leads mechanical properties to be reduced under the effect of cumulative energy and stresses from the arc current,resulting in a large number of cracks. The key to improve the life of overhead insulated cables is to avoid "weak insulation"of insulation material itself. |
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| Keywords: | overhead insulated conductors failure aging finite element analysis |
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