直升机带电修补雷击受损光缆技术及应用研究

Research on Helicopter Live Repair Technology for Optical Cable Damaged by Lightning and Its Application

摘要:

高压架空输电线路的光缆修补技术直接影响修补作业的安全顺利实施和线路运行的可靠性。针对姜资一线500 kV输电线路雷击导致的光缆断股危急缺陷，考虑迎峰度夏期间电网无法停电检修的特殊情况，文中采用直升机绞车吊椅作业法成功实现了该500 kV输电线路受损光缆修补。所提方法采取地电位带电作业方式，提出了运用“楔形线夹+纯铝引流线”全新修补模式修补断股光缆，安全高效地完成了光缆断股危急缺陷消除工作，为超高压输电线路的安全稳定运行提供了坚强保障，为类似输电线路缺陷消除具有指导意义和参考价值。

Abstract:

The optical cable repair technology of high-voltage overhead transmission lines directly affects the safe and smooth implementation of repair operations and the reliability of line operation. In view of the critical defects of optical cable breaking caused by lightning strike on 500 kV transmission line of JiangZi line, and considering the special situation that the power grid cannot be cut off for maintenance during the peak summer, the helicopter winch lifting chair operation method is used to successfully realize the repair of the damaged optical cable of 500 kV transmission line. This method adopts the live working mode of ground potential, and uses the new repair mode of "wedge clamp+pure aluminum drainage line" to repair the broken optical cable. By formulating all-round organization, technical and safety measures and emergency plans, the elimination of critical defects of broken optical cable is safely and efficiently completed, which provides a strong guarantee for the safe and stable operation of extra-high voltage transmission lines, and has an important guiding significance and reference value for similar defect elimination of transmission lines.