重合闸前加速与后加速保护应用分析

Analysis on Reclosing Pre-acceleration and Post-acceleration Protection

在现在供电网络中,架空线路仍占有一定比例,而在架空线路的故障中由于暂时性故障引起,如雷电、异物悬挂、风吹树枝接触线路、小动物攀爬等。这些事件引起的线路故障只是暂时导致线路绝缘降低,但一但切断电源后,异物消失,线路绝缘又可自动恢复,在这种情况下合理利用线路重合闸可有效提高线路供电可靠性水平,对前加速与后速重合闸的适用范围及优缺点加以论述以供参考。

In the present power supply network,overhead lines still occupy a certain proportion,and the overhead line failure are caused due to a temporary failure,such as lightning,objects hanging,tree branches touching,climbing of small animals,etc.Line failures caused by these events lead to only temporary reduced wiring insulation,and once the power is cut off,objects disappear,and line insulation can be automatically restored.Therefore,the rational use of reclosing can effectively improve the reliability of power supply line.This paper discusses the applicable scope of pre-and post-acceleration reclosing,and their respective advantages and disadvantages.