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高压电器  2015 

直流和脉冲电压下绝缘沿面闪络试验系统的研制

, PP. 35-39

Keywords: 沿面闪络,特征阻抗,阻抗匹配,Marx发生器,同轴几何结构,脉冲电压

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Abstract:

为了研究大气压下绝缘沿面闪络机理,研制了一套直流和脉冲电压下绝缘沿面闪络试验系统。由于沿面闪络是ns时间分辨的动态变化过程,为了使测量的暂态信号是由沿面闪络本身产生,此系统经过特殊设计,主要包括放电室和同轴电缆采用同轴几何结构连接,阻抗匹配;电源和同轴电缆阻抗匹配。该系统放电室内外导体半径为3.6cm和8.3cm,施加的直流电压为±80kV,施加的脉冲电压幅值为460kV,上升时间为36ns。研制的试验系统能满足4cm间隙沿面闪络试验要求。

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