Abstract: A method for modeling a network topology of a subarea of a low-voltage network, wherein the network topology of the subarea of the low-voltage network is dynamically changeable by switching on, over and/or off components and/or by adding or removing components, where the network topology is modeled as a graph with nodes and edges, states valid for all edges of the graph at an initialization time are determined and assigned to the edges as the respective first state instance, with each subsequent change to the network topology, the respective current states valid for the respective edge from a time of the change to the network topology are determined for the edges of the graph, and each edge of the graph is assigned the respective state determined and currently valid from the time of the respective change to the network topology as a respective further state instance together with a timestamp.