雷电取能用于500kV线路避雷器监测

Energy extracting for 500 kV transmission lines arrester monitoring

500kV带间隙线路避雷器寿命监测装置电能的获取最简单的方式是直接利用雷电.用雷击时流过线路避雷器的雷电流作为电磁感应取能装置的原边电流,实现了线路避雷器监测装置对通过带间隙线路避雷器的雷电流20kA及以上大电流和100A以上小电流的动作计数;大电流计数次数体现避雷器的剩余寿命,小电流计数值为避雷器遭雷击次数.试验证明用雷电流取能满足计数器动作要求.

The simplest way to provide energy for life prediction of 500 kV transmission lines arrester with gap is to use lightning directly.While lightning stoke on the transmission line,the lightning current going through the line arrester is used as the primary side current for the electromagnetic induction energy taken device,this line arrester monitoring device can count the lightning current through line arrester with gap that more than 20 kA and small current that more than 100 A.The larger current count value reflect the remaining life of arrester while the small current count value shows how many times the arrester has been stroked by lightning.Energy extracting from lightning current achieves the requirements of the counter through experiments.