电感在两级电涌保护器设计中的应用

Design and application of series inductance in two-stage SPD

介绍了雷电波在遇到串联电感时,不同的时刻折、反射系数会发生变化,雷电波通过它们时将发生波形的改变.雷电波的陡度降低,雷电波的电压幅值也相应降低.根据这一原理,利用ICGS冲击平台进行大规模的试验,通过对实验数据进行对比分析,提出在多级电涌保护器的设计中,采用串联电感的方法可以降低电涌保护器的残压,相对地增加SPD的承受能力,提高电涌保护器的保护效果,对电力系统的防雷保护具有重要意义.

This paper explains that refraction reflection coefficients will change at different time when the lightning wave comes,as a result,the shape of lightning wave will change when they get through the series inductance.Voltage amplitude of lightning wave will reduce as long as the gradient of lightning wave decreases.According to this basic principle,a large scale of tests were carried out on ICGS.Comparative analysis shows that the residual voltage could be reduced by adding of the series inductance,thus enhance the tolerance capacity and improve the protection effect of multi-stage SPD.The application of series inductance in SPD is of great significance to the lightning protection in the power distribution system.