CAJ | 학술논문

当输电线路遭受雷击或绝缘子串工频闪络时,采用喷射气体灭弧防雷间隙装置能够有效保护绝缘子串免受工频电弧的灼烧,同时在冲击闪络击穿间隙后,能够迅速切断暂态电弧.其原理为:装置瞬间产生高速气流,在电弧处于“幼年”时就将电弧熄灭,这样深度抑制了电弧,即在暂态电流值为几安或者几十安时,气流就将电弧熄灭,最理想的情况就是没有电弧产生(由于电流值小,能量不足以维持电弧产生).可见高速气体作用在电弧的时间点越早,灭弧效果越好.文中对该理论和喷射气流灭弧防雷间隙进行试验验证,采用高速摄像机拍摄画面,较好地反映了气流对电弧的深度抑制作用.
당수전선로조수뢰격혹절연자천공빈섬락시,채용분사기체멸호방뢰간극장치능구유효보호절연자천면수공빈전호적작소,동시재충격섬락격천간극후,능구신속절단잠태전호.기원리위:장치순간산생고속기류,재전호처우“유년”시취장전호식멸,저양심도억제료전호,즉재잠태전류치위궤안혹자궤십안시,기류취장전호식멸,최이상적정황취시몰유전호산생(유우전류치소,능량불족이유지전호산생).가견고속기체작용재전호적시간점월조,멸호효과월호.문중대해이론화분사기류멸호방뢰간극진행시험험증,채용고속섭상궤박섭화면,교호지반영료기류대전호적심도억제작용.
When transmission line is lightning-stricken or power frequency flashover of insulator strings occurs, adopting air-blast arc quenching device the insulators can be effectively saved from cauterization caused by power frequency arc, and after the device struck down by impulse flashover the transient arc can be quickly broken by air-blast arc-quenching device. The working principle of air-blast arc quenching device is as following: the device can produce jet-stream instantly and the arc will be extinguished in its initial phase, thus the arc is suppressed thoroughly, in other word, the air-blast extinguishes the arc when the value of transient arc current is a few amperes or dozens of amperes, and the ideal situation is that there is not existence of the arc at all. The earlier the jet-stream acts on the arc, the better the arc extinguishing effect will be. Experimental verification of the proposed theory and air-blast arc-quenching device is performed. The pictures taken by high-speed camera reflect the thorough inhibition effect of high-speed jet stream on the arc.