高电压纳秒气体开关绝缘恢复特性的实验研究  

Experiment Research of High Voltage Nanosecond Gas Switchês Insulation Recovery

作　　者：卢彦雷[1] 樊亚军[1] 石磊[1] 乔汉青[1] 夏文锋 朱郁丰[1] 

机构地区：[1]西北核技术研究所,西安710024

出　　处：《高电压技术》2015年第6期1852-1856,共5页High Voltage Engineering

摘　　要：气体开关绝缘恢复曲线中存在的＂平台现象＂,大大延长了开关的绝缘恢复时间,但其存在原因尚未取得共识。为此,结合GW级Tesla型ns脉冲源,在开关工作电压约220 k V情况下,研究了不同气压（0.1~7 MPa）的N2、H2、SF6 3种气体开关的恢复特性及稳定性。结果表明：对于N2、H2开关,随着气压的升高,开关恢复曲线中的＂平台现象＂逐渐减弱,当气压超过一定阈值后,开关＂平台现象＂消失;对于SF6开关,则不存在＂平台现象＂。可见对于N2、H2、SF6 3种气体＂平台现象＂产生的原因是不同的,同时Tesla型脉冲源对开关的＂平台现象＂也具有一定的影响。N2、H2、SF6气体绝缘恢复系数达到95%的最短时间分别为7.1 ms、0.68 ms、5.4 ms。Platform phenomenon （PP） is observed in gas switch insulation recovery curves and they lengthen the recovery time of the switches a lot. However the reason for PP is not clear yet. Based on the platform of GW level Tesla nanose- cond pulser with its switch working at about 220 kV, we measured and analyzed the recovery and stability characteristics of the switch, which was filled the switch with different gases pressure （N2, H2, SF6） of a large range of pressure （0.1-7 MPa）. For N2 and H2, with increasing pressure, PP fades before it vanishes when the pressure is high enough. Meanwhile for SF6, there is no PP d entirely, so it is obvious that the reason for PP is much different for different gases and the Tesla pulser contributes to PP to some extent. For the recovery coefficient of 95%, the minimum times needed for insulation recovery ofN2, H2, SF6 are 7.1 ms, 0.68 ms, 5.4 ms respectively.

关 键 词：高重频 气体开关 气体放电 绝缘恢复特性 平台现象 Tesla型纳秒脉冲源 双脉冲法 

分 类 号：TM564[电气工程—电器]