Method for recognizing grid topology based on measurement spanning tree

The invention relates to a method for recognizing grid topology based on a measurement spanning tree, belonging to the technical field of electric power system dispatching automation. The method comprises the steps of: firstly, generating a bus-branch model of a network and a tree structure, and calculating voltages and phase angles of nodes by layers; calculating active and passive powers of twoends of the branches according to impedance parameters of the branches; checking the calculating values and the measurement values, if having larger deviation, adding a bad mark on a corresponding network element, sequencing suspicious degrees of the bus and the branches according to the quantity of the bad marks; speculating switch brakes with telecommands possibly having errors and lines with operation states possibly having errors from the suspicious bus and the suspicious branches; and determining whether the deflection of the switch brakes is reasonable or not through judging whether thequantity of the bad marks