In Substations distance protection method for a wide area

The present invention discloses a wide-area-oriented substation distance protection method, including the following: Construction of a multi-master sub-master station in the area of ​​the grid - substation protection and control system; secondary to the disappearance of the DC power supply and connected thereto substation to protect the target line, the respective slave stations complete protection in situ from a wide area is determined, and the information is sent to the master; the master station in situ determination entire substation after the loss of power, the slave station to send binding, the complete substation power failure protection function from the wide area, quickly isolate faults in the electrical substation failure area. When this method for protecting a serious accident secondary substation DC power supply disappearance may occur in the grid, quickly removed Substation fault in the electrical area, to protect the safety and stable operation of the power grid.