Method for determining circuit states in energy supply networks and system for performing the method

The method involves determining the network topologies to a power supply system based on the existing network elements (N1-NN) and the possible states of the switches (S1-SN) of the network. The associated fictitious voltage values ??are calculated from the measured current values. The calculated fictive voltage values ??are compared with the measured voltage values. The network topology with the lowest deviation between calculated voltage values and the fictitious measured voltage value is detected as the actually present current network topology. An independent claim is included for system for determining switching states in power supply system.