一起220kV变电站母线TV二次回路的改造

220 kV变电站距离保护、方向保护等对母线电压互感器(TV)二次电压大小、方向有着严格要求,因此在对二次电压回路改造时不仅不能使电压失电、短路,还应注意回路接地、TV极性等问题。文中介绍了一起220 kV变电站母线TV二次回路改造案例,并对改造中应注意的问题提出一些探讨,且能对类似的工程改造有所帮助。

Discussion on the Secondary Circuit Remoulding of a 220 kV Bus TV

The distance protection and directional protection in 220 kV substation require a lot on the secondary voltage size and direction of bus TV. Therefore, during the period of secondary voltage loop reform, constant voltage must be kept and the problems of loop ground and voltage polarity must be avoid. A 220 kV substation bus TV secondary loop reform is introduced in this paper. Based on the introduction, some problems should be noticed for future similar projects are discussed.