Auxiliary analysis system for tidal current chart of power system

The invention discloses an auxiliary analysis system for a tidal current chart of a power system. A data interaction module extracts power grid data obtained through analysis from an energy management system (EMS) of a power grid in real time. A K-grade adjacent node analysis module selects one plant station node from plant station node information to serve as an original node, takes one or more plant station nodes directly associated with the original node as first-layer nodes and takes one or more plant station nodes directly associated with the first-layer nodes as second-layer nodes, K -layer nodes are obtained in the same way, and a K-grade adjacent node topological relation structure is formed. A model variance analysis module receives the power grid data extracted by the data interaction module in different N time periods and analyzes difference of the power grid data in different time periods to obtain different information of the power grid in different time periods. A display module displays the K-grade adjacent node topological relation structure or different information of the power grid in different time periods. According to the auxiliary analysis system, auxiliary analysis operation is easy, and the change situation on the topological relation of the power grid nodes can be known about easily.