【摘要】 文中采用电磁暂态分析程序(electro-magnetic transients program,EMTP),以西山750 kV气体绝缘开关设备(gas insulated switchgear,GIS)电站为工程背景,计算研究了多种运行方式下隔离开关操作引发的快速暂态过电压(very fast transient overvoltage,VFTO),深入分析了VFTO波形的特点,提取出其特征参量,并对特征参量进行规律统计,为VFTO标准波的归纳提供参考。计算结果表明,西山750 kV GIS电站所产生的VFTO最大幅值平均为1.87 p.u.,最大为2.63 p.u.;第一峰值点平均陡度为5.85 kV/ns,最大为14.82 kV/ns;振荡持续时间平均为3.76 s,最大为5.67 s。更多还原

【Abstract】 In this paper,the electro-magnetic transients program(EMTP)is used to calculate the very fast transient overvoltage(VFTO)generated in the Xishan 750 kV gas insulated switchgear(GIS)substation during the switching of disconnectors in different operation modes. The characteristic parameters of the VFTO waves are extracted and it is analyzed that the statistical regularity of the features and parameters of the VFTO waves. The calculation results show that, the average amplitude of VFTO generated in Xishan 750 kV GIS substation is 1.87 p.u. and the maximum amplitude is 2.63 p.u.;the average gradient of first peak points is 5.85 kV/ns and the maximum gradient is 14.82 kV/ns;the average duration of oscillation is 3.76 s;the maximum duration is 5.67 s.更多还原