复合绝缘子断串原因分析及防范措施

复合绝缘子断串问题是威胁输电线路安全稳定运行的关键问题。为系统分析复合绝缘子断串类型和原因,文中对实际运行复合绝缘子断串样品进行了统计分析,并对金具破损及芯棒脆断等引起的断串问题进行了总结归纳。结果表明绝缘子芯棒断串原因主要为端部密封失效、外护套破损、芯棒与护套界面粘结失效等。基于上述分析,文中提出了加强入网检测和运行性能分析、重视日常带电检测工作及对重要通道复合绝缘子技术改造三方面措施,从而为复合绝缘子断串防治提供参考。

Composite Insulators Fracture Fault and Preventing Methods

The fracture problems of the composite insulators are the key problems to threat the security and stability of the transmission line.In order to analyze the types and causes of the fracture problem,this paper studies the fracture samples of the composite insulators and classifies the fracture types of insulator hardware and FRP rod.Studied shows that the causes included the invalidation of sealant,breakage of the sheath and splice failure between the FRP rod and the sheath.To solve the problems,three solutions including performance test,on line detection and technical transformation of the composite insulators in the important passage are proposed.And preventing suggestions to the fracture problems are provided.