Patent Document ID: 10073148
Application ID: 14411215
Patent Flag: 1

Claim One:
1. A method for detecting a fault in an electrical energy supply network, the method comprising: determining, with a respective intelligent electrical device (IED), state values for a plurality of measuring points in the energy supply network, the state values indicating an electrical state of the energy supply network at the respective measuring point; transmitting the state values from the IEDs to a centralized control center device via a communication bus, the control center device having an evaluation device; and using the state values by the evaluation device for detecting a fault that may be present in the energy supply network; performing a state estimation with the evaluation device, the state estimation making use of a model description of the electrical energy supply network that is suitable for describing possible electrical states of the energy supply network on the basis of state variables; carrying out a check by the evaluation device during the state estimation to determine whether the model description allows an electrical state of the energy supply network to be described which, in respect of the state variables used for the respective measuring points, at least approximately agrees with the respective state values; and absent such an electrical state, generating with the evaluation device a fault detection signal indicating a presence of a fault in the energy supply network.