多级气体放电管与氧化锌压敏电阻并联配合的辉光弧光放电性能分析

Performance Analysis of Glow and Arc Discharge for Multistage Gas Discharge Tube in Parallel with Zinc Oxide Varistor

针对多级气体放电管(GDT)与ZnO压敏电阻的并联配合使用的问题,根据多级GDT及ZnO压敏电阻的工作原理,把ZnO压敏电阻依次并联多电级GDT不同级数进行测试时,并联级数越多,越能有效拉低点火电压,并具有击穿后能分流的特性。利用气体放电理论进行工频电压下的组合器件辉光、弧光放电试验,在分析了辉光、弧光放电电压、时延、电流与工频电压之间的关系后,得出并联不同级数时,组合器件的静态参数与辉光、弧光各参数的匹配效果对泄流影响:静态参数中压敏电压与并联的GDT管点火电压相差越大,放电特性越容易从开关型SPD向限压型SPD转变。由实验数据解释辉光、弧光各参数与工频电压和静态参数间关系,提出可用工频电压源下辉光、弧光测试ZnO压敏电阻与多级GDT并联使用性能对比方法,在实际应用中对选择复合型SPD有一定的参考价值。

For multistage gas discharge tube （GDT） and ZnO varistor sed parallel problems, ac- cording to the working principle of the multi-level GDT and ZnO varistor, when the ZnO varistor in paral- lel with a series of GDT, the more parallel series, the more can effectively lower ignition voltage, and the characteristics of the shunt after breakdown. Using the theory of gas discharge device under power fre- quency voltage of glow, arc discharge test, After analyzing the relationship between glow, arc discharge voltage, time delay, current and power frequency voltage, it is concluded that the discharge influence of the static parameters of different series parallel combination device and the parameters of glow, arc matching effect ; the greater between Static parameters of the pressure sensitive voltage difference and parallel GDT tube ignition voltage, the discharge characteristics of the easier from the switch type SPD to type pressure limiting type SPD. From experimental data the relationship between glow, arc parameters and the power frequency voltage and static parameters are explained, the glow, arc tests under 50 Hz voltage source, ZnO varistor in parallel with multistage GDT performance comparison method are put for- ward, in the practical application of the choice of the compound type SPD has a certain reference value.