Abstract: A method for controlling and/or closed-loop controlling an electric energy system. Empirical data are provided in a first data storage device for stabilizing the energy system, and a multi-dimensional decision matrix created with a data processing system in a second data storage device. The decision matrix respectively containing as a first dimension derived from the empirical data, system states of the energy system and in the energy system as a second dimension, possible results. Phasor measurement data for current and voltage with a high temporal resolution and a time stamp are obtained with phasor measuring devices distributed in the energy system and used to control the electric energy system. A system state and a result determined by the data processing system using the phasor measurement data and at least one step is selected and automatically carried out for securing the stability of the energy system.

Abstract: A method for controlling and/or closed-loop controlling an electric energy system. Empirical data are provided in a first data storage device for stabilizing the energy system, and a multi-dimensional decision matrix created with a data processing system in a second data storage device. The decision matrix respectively containing as a first dimension derived from the empirical data, system states of the energy system and in the energy system as a second dimension, possible results. Phasor measurement data for current and voltage with a high temporal resolution and a time stamp are obtained with phasor measuring devices distributed in the energy system and used to control the electric energy system. A system state and a result determined by the data processing system using the phasor measurement data and at least one step is selected and automatically carried out for securing the stability of the energy system.

Abstract: In an electrical supply network containing a generator, critical fluctuations in real power can occur. The load angle of the generator is representative of these fluctuations. The present invention provides a method which measures the real and reactive power flow, the current and the voltage on a line to the generator and feeds these measured values along with reactance values Y.sub.L and Y.sub.Q of the generator and line to a computing device. The computing device determines an output signal .delta. which represents the load angle of the generator and fluctuations in real power. The output signal .delta. is provided to an indicating device and/or a reactive power compensator.