Research on 220 kV Bus Differential Protection during Commissioning of New Devices
Through the trial run of 220kV electrical devices,analyzed the use of 220kV bus differential protection in three aspects: transmission test,power charge switch,and with load check.Then elaborated the characteristics of bus differential protection,proposed suggestions to using bus differential protection in different stages,also gave the use-guide,the principles and precautions in using bus differential protection,to improve the level of safety during the commissioning of the electrical devices.