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电容器组投切用SF6断路器介质恢复特性数值计算与试验研究

, PP. 161-171

Keywords: SF6断路器,气流场,动态击穿,介质恢复

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Abstract:

针对126kV电容器组专用SF6断路器介质恢复特性进行数值计算与试验研究。对断路器灭弧室电场和气流场进行数值计算,依据流注理论,得到断路器触头间击穿电压曲线;搭建试验回路对断路器触头间隙动态击穿特性进行试验,测量断路器合闸和分闸过程中的击穿电压;结合数值计算与试验结果,分析不同压强对断路器合、分闸过程击穿电压的影响,给出高压SF6断路器介质恢复特性的变化规律。研究结果表明对于同样的触头间隙,合闸过程(平均速度4.7m/s)击穿电压大于分闸过程(平均速度9.6m/s)。

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