对吹式爆炸气流灭弧防雷装置熄弧效果研究

The Arc-Extinguishing Effect Research of Blowing Explosion Airflow Arc-Extinguishing Lightning Protection Device

为了研究对吹式爆炸气流灭弧装置的熄弧效果,建立mayr电弧模型,仿真分析气流耦合电弧过程。同时构建试验电路进行灭弧试验并采用摄像机记录在高速气流作用下整个电弧熄灭过程。仿真与试验结果表明:该灭弧装置能在工频续流的第一个过零时刻熄灭工频电弧,熄灭电弧后对吹式灭弧装置间的间隙没有被再次击穿,说明了对吹式灭弧防雷装置有效抑制电弧重燃,具有实用价值。

To validate the arc-extinguishing effect of the blowing explosion airflow Arc-extinguish- ing lightning protection device, the established mayr arc model was used to simulate and analysis the pro- cess of airflow coupling with arc. Meanwhile the arc-extinguishing experiment was carried out by con- structing the test circuit. And entire arc-extinguishing process under high speed airflow was recorded by using camera. The simulation and experimental results showed that： the power frequency arc can be extin- guished in the first zero-time of frequency freewheeling. The gap between the devices was not breakdown after the arc was extinguished again, which proved that the device can effectively inhibit arc reignition. And it has practical value.