摘要
对500kV输电线路采用倒V型绝缘子串是解决覆冰闪络的一项很有效的措施。但500kV线路的四分裂导线、绝缘子串及其悬挂金具受力情况较为复杂,而且4根导线的荷载也大得多,因此对其力学特性、冰闪电压,尤其是悬垂线夹的握力能否满足绝缘子串斜向悬挂所产生的水平分力,进行了试验和研究。在力学试验中,采用了倒V型绝缘子串的横担侧挂点固定、导线侧加力的方法。试验研究结果表明:一般500kV线路悬垂绝缘子串均可进行倒V型绝缘子串改造;只有当大档距或大高差时,通过采用加强型大握力线夹,也可以进行倒V型绝缘子串改造。
The beckward Ⅴ insulators for 500 kV transmission line is effective measure for preventing insulators ice flashover. But, the force of quad bundle and insulator string and yoke plate of 500 kV transmission line is complex. In the mechanic testing, the method of beckward Ⅴ insulators with the side fixing of cross - arm and adding force on side of wire was adopted. Test and research result shows that the retrofit of backward Ⅴ insulators can be carried out for 500 kV suspension insulator string, and when it is big span or high difference, the retrofit of backward Ⅴ insulators can be through with reinforced type line clamp.
出处
《电力设备》
2006年第3期37-40,共4页
Electrical Equipment
关键词
电力系统
输电线路
500kV
悬垂绝缘子串
倒Ⅴ型
线夹握力
power system
transmission line
500 kV
suspension insulator suing
backward Ⅴ insulators
grip of clamp
作者简介
易辉（1950-），男，硕士，高级工程师，从事输变电外绝缘、带电作业及高电压试验技术的研究工作。
