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。
The failure samples of lightning strike from a certain area of Fujian coast were analyzed in detail by the macrophotography,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 canmake insulated layer untimely failure.The insulator load side exist the biggest stress and deformation.The intrinsic shortcomingsof overhead insulated conductor leads mechanical properties to be reduced under the effect of cumulative energy and stresses fromthe arc current,resulting in a large number of cracks.The key to improve the life of overhead insulated cables is to avoid"weakinsulation"of insulation material itself.
作者
陈云翔
蔡建宾
林德源
庄建煌
江祖瑄
黄伟林
邵艳群
Chen Yunxiang;Cai Jianbin;Lin Deyuan;Zhuang Jianhuang;Jiang Zuxuan;Huang Weilin;Shao Yanqun(State Grid Fujian Electric Power Research Institute, Fuzhou 350007, China;State Grid Putian Electric Power Supply Company,Putian 351100, China;College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2017年第3期94-97,125,共5页
Engineering Plastics Application
基金
国家自然科学基金项目(11374053)
福建沿海区域电网设备腐蚀机理及综合治理技术研究(52130414004X)
关键词
架空绝缘导线
失效
老化
有限元分析
overhead insulated conductors
failure
aging
finite element analysis
