组合型SPD器件参数配合的效应试验研究

The Test Research on Device Coordination Effect Used in Combination Type SPD

对于低压配电系统的雷电防护,单相组合型SPD中气体放电管的作用是泄放大电流,压敏电阻的作用是将残压控制在被保护设备耐受冲击电压之下。为使这两种器件配合的组合型SPD能产生最佳效果,利用复合波发生器对不同参数的气体放电管和压敏电阻配合形成的组合型SPD进行冲击。冲击后分析分别流经气体放电管和压敏电阻的电流值以及组合型SPD的残压值研究最佳配合的条件。最终得出无论是固定气体放电管的冲击击穿电压值或固定压敏电阻的压敏电压值,都应选择与之动作电压相近的元件进行配合。同时探究组合型SPD的残压值在最佳配合条件下工作时为最小,气体放电管的通流容量在此刻起到泄放电流的作用。

As for lightning protection of low voltage distribution system, GDT applies to discharging current and MOV applies to controlling the residual voltage under the equipment withstand voltage.In order to ensure thatmake these two devices with the combination type SPD can achieve the best effect,, the complex wave generator impact with different parameters of combination type SPD is used to impact.We , aAnalyze the current value of through the GDT and MOV and residual voltage of combination type SPD after impacting, and investigate the best coordination conditions.It is obtained that either fixed starting voltage of gas charge tube or breakdown voltage of MOV should select the similar action voltage components to combine with each other..The value of residual voltage of combination type SPD is minimum and the discharge current capacity of GDT has the effect of discharge current in best coordination.