Method for generating a signal indicating an oscillation in an electrical energy supply network

A method for generating a signal indicating an oscillation of an electrical variable in an electrical energy supply network, which comprises the following steps of:

• synchronously recording current and/or phasor voltage measurement values at least at one measuring site in the electrical energy supply network by means of a respective phasor measuring device;
• transmitting the current and/or phasor voltage measurement values to a control center system monitoring the energy supply network;
• calculating, via the control center system, a state variable characterizing an oscillation state of the electrical variable from the current and/or phasor voltage measurement values;
• investigating a profile of the state variable with regard to an existing oscillation in the energy supply network by the control center system and, given an existence of an oscillation, carrying out by the control center system the further steps of:
• determining an amplitude characteristic value indicating an amplitude of the profile of the state variable;
• determining a damping characteristic value indicating a damping of the oscillation of the profile of the state variable;
• comparing a position of a respective value pair containing the amplitude characteristic value and the damping characteristic value with hazard ranges present in a value range which indicate a particular hazard level of the oscillation in the energy supply network while determining a hazard parameter;
• and
• outputting the signal indicating the oscillation, depending on the hazard parameter.