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methods for detecting electrical variables from a three-phase AC network, and for supplying electricity to an AC network, measuring devices for detecting electrical variables from a three-phase AC network, and power supply for electric power in an ac grid, and, wind power installation
methods for detecting electrical variables from a three-phase AC network, and for supplying electricity to an AC network, measuring devices for detecting electrical variables from a three-phase AC network, and power supply for electric power in an ac grid, and, wind power installation
The present invention concerns a method of detecting electric variables of a three-phase AC network having a first, a second and a third phase, including the steps of measuring a respective voltage value of the first, second and third phases in relation to a neutral conductor at a first moment in time, transforming the three voltage values of the first moment in time into polar co-ordinates with a voltage amplitude and a phase angle, repeating measurement and transformation for at least one further moment in time, and determining the currently prevailing frequency, voltage amplitude and/or phase angle of at least one of the phases from the voltage values transformed into polar co-ordinates.
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