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对于具有功率方向的过流保护,只有方向元件的动作方向正确,才能保证该类保护正确动作。介绍了乌江渡发电厂地理信息系统(GIS)改造后,对于采用外接零序电压的零序方向保护动作方向的校核方法。
For overcurrent protection with power direction, only the direction of action of the directional elements is correct, in order to ensure the correct action of such protection. This paper introduces the method of checking the direction of zero sequence directional protection with external residual voltage after the transformation of Geographic Information System (GIS) in Wujiangdu Power Plant.