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An operating scheme discussion on the 500 kV transformer neutral point spare small reactor
Author(s): 
Pages: 64-67,73
Year: Issue:  20
Journal: RELAY

Keyword:  500 kV变电站备用小电抗器方案投入和退出原则自动切换过程与计算机监控的配合;
Abstract: 对我国现行500 kV变压器中性点经小电抗器接地运行方案进行了介绍.由于不允许中性点具有不同接地方式的变压器并联运行,小电抗器维修将迫使该变压器停运,带来不必要的经济损失.也使零序网发生不必要的改变.这是它的不足.为使小电抗器维修时变压器停运时间尽可能短,提出了公共备用小电抗器运行方案,并论述了运行原则.从调度、运行、继电保护角度看,问题被简化.从实用角度,提出了电动隔离开关的一种自动切换方法,结合备用小电抗器投入和退出原则进行了较详细的说明.
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