山区超高压输电线路玻璃绝缘子串防覆冰闪络措施研究  

Research on Preventing Icing Flashover of Ultra High Voltage Transmission Line Glass Insulator Chain in Mountains

作　　者：王琨[1] 谷永刚 彭青宁 谭敏戈 许阳[1] 

机构地区：[1]西安供电局,西安710032 [2]西北电网有限公司,西安710048

出　　处：《电网与清洁能源》2008年第8期9-12,共4页Power System and Clean Energy

摘　　要：秦岭山区由于其特殊的地理环境和气象条件屡屡出现山区内线路绝缘子覆冰闪络故障。由于绝缘子串覆冰后冰凌桥接伞裙,造成绝缘子串电压分布的畸变,致使绝缘子串闪络电压降低并引发冰闪。在绝缘子串中安装大盘径绝缘子可以阻断冰凌桥接通道,在一定程度上提高绝缘子串覆冰闪络电压,如安装数量和方式合理,可以保证绝缘子串的正常运行。The particular geographical and meteorological environments of Qinling Mountains have repeatedly brought about the icing flashover faults of the line insulator. Since the shed is bridged by icicle after the insulator chain is ice-covered, the voltage distribution of the insulator chain will be distorted accordingly, which may decrease the flashover voltage of the insulator chain and further cause the icing flashover. The bridging channel of icicle can be blocked by installing insulator with large plate radius type amid the insulator chain. It can enhance the ice coating flashover voltage of the insulator chain to some extent. The insulator chain can be guaranteed to operate normally provided that the installing amount and style are reasonable.

关 键 词：绝缘子 覆冰 大盘径 

分 类 号：TM216[一般工业技术—材料科学与工程]