500kV输电线路采用倒V型绝缘子串的试验研究  

Test and Study of Backward V Insulators for 500 kV Transmission Line

作　　者：易辉[1] 

机构地区：[1]武汉高压研究所,湖北省武汉市430074

出　　处：《电力设备》2006年第3期37-40,共4页Electrical Equipment

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.

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 

分 类 号：TM726.1[电气工程—电力系统及自动化] TM216[一般工业技术—材料科学与工程]