Power supply network simulation model extraction method and extraction device based on undirected loop graph

The invention provides a power supply network simulation model extraction method and device based on an undirected loop graph. The method comprises the following steps: S1, extracting all power supply networks, power supply assemblies and power supply network pin files from a netlist file; s2, setting a screening condition by a user according to requirements, and screening out a required power supply assembly; s3, the undirected loop graph complete topology is constructed according to the power supply assemblies, the power supply assemblies are nodes, and the power supply network is an edge; s4, splitting the power supply network into a plurality of sub-networks according to whether the power supply network has connectivity or not; and S5, determining a starting point of a power supply component of the required power supply network, endowing a weight to the node of the undirected looped graph, and performing weight-based deep traversal and backtracking access on the undirected looped graph to extract the undi