激光辐照绝缘样品不同位置的沿面闪络性能

Surface flashover performance of different laser illumination positions on insulator sample

绝缘体沿面闪络是制约脉冲功率技术发展的瓶颈之一。为了能对沿面闪络机理有更深的认识,通过在沿面闪络过程中引入激光辐照的作用,考察了绝缘样品上不同的辐照位置对于沿面闪络性能的影响。实验结果表明:辐照位置越靠近闪络起始的地方,对沿面闪络性能的影响越大;在沿面闪络的过程中,不同的阶段如闪络起始阶段及电子倍增阶段在整个闪络过程中所起的作用不同。

Insulator surface flashover is one of the bottlenecks restricting the development of pulsed power technology. To obtain a deeper understanding of flashover mechanism, UV illumination was introduced into surface flashover process. The flash- over performance of different illumination positions on the insulator sample was studied. The experimental results show that the effect is larger when illumination position is close to the cathode triple junction where the flashover initiates, reflecting that differ- ent flashover stages play different roles in the flashover process.