methods for detecting electrical variables in a three-phase AC network, and for supplying electrical power in an electrical AC network, measuring devices for detecting electrical variables in a three-phase AC network, and for supplying power to electrical energy in an ac network, and, wind power installation

摘要

methods for detecting electrical variables in a three-phase AC network, and for supplying electrical power in an electrical AC network, measuring devices for detecting electrical variables in a three-phase AC network, and for supplying power to electrical energy in an ac network, and, wind power system the present invention relates to a method for detecting electrical variables in a three phase ac network that has a first, second, and third phase, comprising 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, transform the three voltage values of the first moment in time into polar coordinates with a voltage amplitude and a phase angle, and determining the current frequency, voltage amplitude and / or phase angle of at least one of the phases from voltage values transformed into polar coordinates.