利用抵消场法计算雷击杆塔顶部时对线路造成的感应过电压，给出了线路感应过电压完整的波形。
In this paper the induced over-voltage on transmission lines caused by lightning strike to tower is calculated based on Wagner Field -cancellation Method.
针对山区输电线路雷害故障较为严重的情况，在输电线路杆塔顶部装设可控放电避雷针可以较好解决雷击问题。
The lightning accident is serious in mountain area to install controllable discharge lightning rod on the tower top can solve the problem of lightning strike.
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