浅谈保护间隙的利弊与应用

Brief Discussion on Advantages & Disadvantages and Application of Protection Gap

紧凑型线路由于塔头尺寸较小,安全距离和组合间隙距离不够,给带电作业造成困难。对500 k V紧凑型线路加装保护间隙的带电作业方式进行了探讨,首先介绍了保护间隙的结构和特性,然后根据一系列的试验和保护间隙动作后的可靠性分析结果,得出结论:挂保护间隙后使紧凑型线路等无法满足最小安全距离和组合间隙距离的线路能够开展带电作业;但在最小安全距离和组合间隙距离能够满足要求的线路上带电作业时,可以不挂保护间隙。

The tower size is smaller and distance of safety and distance of complex gap are not enough in compact transmission line, which bring difficulties to live line work. The live line work mode of adding protection gap in 500 kV compact transmission line is discussed. Firstly, structure and characteristics of protection gap are introduced, then based on a series of test and reliability analysis re- sults after the action of protection gap, it is concluded that after the addition of protection gap makes possible to develop live line work in lines such as compact transmission line and so on which cannot satisfy minimum distance of safety and complex gap. But when live line work is done on lines which satisfy minimum distance of safety and complex gap ,the protection gap may not be added.