220kV变电站单主变运行的备自投实现方式

Implementation of automatic switching when single main transformer operated in 220 kV substation

单主变220 kV变电站正常方式下,主变中压侧110 kV系统不和其它的220 kV变电站的110 kV系统环网运行,当主变110 kV侧失压时,将会造成本站110 kV母线及母线上所接的110 kV变电站全停。针对单主变220 kV变电站的运行特点,我们充分考虑与现有国产设备的兼容性,在对国产现有备自投装置硬件稍加改动的基础上,设计开发出了单主变备自投,并编制了相应备自投装置充电、动作及闭锁方案。目前,该备自投装置已经投产运行两年,运行状况良好。该方案设计在全国尚属首次,应用前景广阔,有普遍的推广意义。

The 110 kV system in a single main - transformer does not work properly with the 110 kV system in any other 220 kV substations. The voltage loss from the 110 kV system in a main-transformer will cause power outage at all other 110 kV systems connected, This paper introduces a design scheme of a main-transformer auto-switch-in device compatible to existing domestic products with charging, operating and locking functions included. This device has been tested and running well for more than two years. This original design has the value to be widely used.