摘要
当GIS变电站中隔离开关操作空载母线时,会形成特快速瞬态过电压波,此电压波在遇到波阻抗不连续处会发生多次折反射,在GIS外壳上形成暂态外壳过电压,影响电力系统的稳定运行。利用ATP软件搭建内部与外壳耦合的500 kV变电站的仿真电路,计算了超高压GIS变电站中TEV的幅值、频率及陡度特性,进而分析TEV的影响因素,得出在工程实际中较适宜的抑制TEV水平的措施。
When the disconnector in the GIS substation operates the no-load busbar,an extremely fast transient overvoltage wave is formed.This voltage wave will be refracted and reflected multiple times when it encounters wave impedance discontinuity,forming a transient shell overvoltage on the GIS shell,which affects the stable operation of the power system.ATP software was used to build a simulation circuit for a 500 kV substation coupled internally to the shell.The amplitude,frequency and steepness characteristics of TEV in ultra-high voltage GIS substation are calculated,and then the influencing factors of TEV are analyzed,and the appropriate measures to suppress the TEV level in engineering practice are obtained.
作者
张文杰
于航
ZHANG Wenjie;YU Hang(Maintenance Company of Henan Electric Power Corporation,Zhengzhou 450052,China)
出处
《电工技术》
2022年第23期227-230,共4页
Electric Engineering
关键词
外壳耦合
合闸相位
不同运行方式
接地引线
shell coupling
close phase
different operation mode
grounding lead
