高电压技术2012，Vol.38Issue(11)：3093-3100,8.
复合绝缘子断裂原因分析及缺陷评价方法
Evaluation Method of Defect and Fracture Reason for Composite Insulator
摘要
Abstract
In order to analyze the reason of the fracture of a composite insulator in service in China Southern Grid,we investigated the appearance inspection,material test and anatomy of the AC 500kV line fracture composite insulator.The results show that the fracture is caused by long-term partial discharge between the core rod and housing,making the core rod serious aging,while the poor adhesion of the interface between the core rod and housing is the main reason for partial discharging.The eclipse hole appears on sheath surfaces under the action of long-term partial discharge.The aging of the core rod is intensified after the moisture enters,leading to the fracture of the core rod.For evaluating the adhesion between the rod and housing,a new five-class evaluation method was proposed.Using this evaluation method,six insulators in service were grading evaluated.Through the classification evaluation,it is known that there are two factors to affect the adhesion between the rod and housing of composite insulators:the adhesion quality of composite insulators during the manufacturing process and long-term high field strength.关键词
复合绝缘子/缺陷检测/评价方法/断裂/绝缘子解剖试验/粘接性Key words
composite insulator/defect detection/evaluation method/fracture/anatomy experiment of the insulator/adhesion performance分类
信息技术与安全科学引用本文复制引用
张福增,宋磊,李锐海,王国利..复合绝缘子断裂原因分析及缺陷评价方法[J].高电压技术,2012,38(11):3093-3100,8.基金项目
特高压工程技术（昆明、广州）国家工程实验室开放基金 （）
