Method and device for operating a power network

The method involves detecting (S101) the state of power system. A switching operation is derived (S102) for network element of the detected state of the power system, so as to correct the detected state of the power system. The derived switching operation is instructed (S103) for the network element, so as to correct the detected state of the power system. An independent claim is included for device for operating network elements of power system.