杠杆法带电更换直路双联单线夹悬垂绝缘子串

Lever-based Method for Live Replacement of Twin Suspension Insulator Strings with Single Wire Clip of Straight Circuit

针对500 kV交、直流输电线路,特别是大荷载直流输电线路直路双联单线夹悬垂绝缘子串的带电更换时,双提线工艺工具沉重,操作劳动强度极大的问题,提出利用杠杆原理研制组合杠杆叉钩卡代替双提线传统工艺,采用单绝缘吊杆挂接组合杠杆叉钩卡组成提线系统,卸去任意一串绝缘子的张力后,另一串绝缘子和提线系统共用承担导线荷载。杠杆法工具轻便,操作省力,安全性高,推广价值高。

In the light of 500 kV HVAC and HVDC, especially the problems of heavy line-lifting tool and very hugh labour intensity during live replacing the twin suspension insulator strings with single wire clip of straight circuit for heavy load HVDC, a built-up fork hook based on lever principle was developed instead of the taditional process, the double lifting lines. By adopting this type buih-up fork hook lift line system, when the tension of any insulator string having released, during the replacement, the another insulator string together with the line-lifting tool carried the conductor weight. This method has advantages of convenient operation, high security and high potential of popularization.