对脉冲电源系统72 h老练实验过程中高压电缆座打火并被击穿情况进行分析,建立高压电缆终端电场分布等效电路,推导出从电缆终端到金属屏蔽层的电势差公式,从理论上分析高压座被击穿的原因是电缆终端绝缘层未做倒角,空间电荷在此处集聚、温度升高导致的.通过定位被击穿高压座击穿孔的位置验证理论分析的正确性,最后提出高压电缆端部绝缘层处理方法,并做72 h老练实验验证了其正确性.%By observing and analyzing the sparking and breaking down of the high-voltage cable socket of the pulsed power supply during the 72 hours conditioning experiment,the electrical field distribution equivalent circuit of the terminal of the highvoltage cable was built,the formula of the potential difference from the cable-terminal to the metal shielding layer was conducted.The reason of breakdown is analyzed theoretically in this paper.It is suggested that the un-chamfered insulation of the cable-terminal causes space charge focusing,which then results in a temperature increase leading to the high-voltage cable socket breakdown.The theoretical analysis is proved by the position of the breakdown hole of the high-voltage cable socket.The handling method of insulation of the cable terminal is presented,which was validated by continuous conditioning experiment for 72 hours.
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