摘要
本文讨论了SF_6和SF_6/N_2气体当温度从10℃时降低到-50℃时正针-平板间隙的放电特性。结果表明,当SF_6气体压力或SF_6/N_2中的SF_6气体分压力大于电晕稳定效应的临界压力时,间隙的击穿电压随着温度的降低而下降;当温度降低到对应的液化温度时,击穿电压下降更伙,即出现一转折点。当气体压力小于电晕稳定效应的临界压力,或由于温度降低而使压力减小到临界压力时,电晕起始电压随温度的降低而下降。SF_6液化将使其绝缘能力降低,但并不是完全丧失其绝缘能力。
The discharge behavior of positive point-plane gap in SF_6 and SF_6/N_2 has been studied for the temperature range of 10℃ to-50℃. The results show that breakdown voltages will decrease when the temperatures decrease for the pressure higher than the critical pressure at which the corona stabilization disappears. When the temperature reaches the liquefying point,the breakdown voltages decrease sharply than ever. If the pressure is smaller than the critical one, following the decreasing of the temperature,the breakdown voltages will increase due to the corona stabilization effect. Liquefying of the SF_6 gas will cause decreasing of the strength of the gas with keeping enough value of the electric strength at room temperalure.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
1990年第4期5-8,共4页
High Voltage Engineering
基金
国家自然科学基金资助项目
