Method for analyzing topological relation of power grid

The invention provides a method for analyzing the topological relation of a power grid. The method comprises the following steps: acquiring an existing topological network of the power grid; searching topological data of all transformers under an operation state or edition state according to the existing topological network of the power grid; ranking the transformers according to the voltage grade from high to low; searching the next grade of transformer from the transformer with the highest voltage grade according to the topological data of the transformer; continuously searching a next grade of transformer by taking the next grade of transformer as the current transformer; saving the searched transformer as a transformer node when the transformer is searched, and saving the transformer node as a network node according to the ranking of voltage grade; constructing a transformer topological network according to the network node; and analyzing the topological relation of to-be-analyzed equipment according to t