降低杆塔冲击接地电阻的有效方法

Methods of reducing tower impulse grounding resistance

输电线路的跳闸原因大多由雷击引起,降低输电线路雷击跳闸率的主要措施之一是降低线路杆塔接地装置的冲击接地电阻。通过对杆塔接地装置的基本冲击特性的论述,提出了降低杆塔接地装置冲击接地电阻的基本原则。介绍了采用接地模块环形集中接地方式对线路杆塔接地装置进行防雷接地改造的基本方法,总结了采用该方式对一条输电线路杆塔进行接地改造后的效果。

Ligntning is the most porpular reason for transmission line trip.Therefore,reducing tower impulse grounding resistance is an essential way to decrease line trip.Principle of reducing tower impulse grounding resistance is proposed by presentation of impulse characteristics.The method of applying ring concentrated grounding in module to lightning protection reform is presented by the result of the method on a line grounding reform.