METHOD AND DEVICE FOR DETECTING AN ELECTRICAL VOLTAGE IN A SUPPLY NETWORK

摘要

The invention relates to a method for detecting the electrical voltage in an electrical, three-phase supply network in terms of magnitude and phase for a fundamental oscillation and at least one harmonic oscillation, comprising the following steps: measuring an electrical, three-phase voltage of the supply network; transforming the measured voltage value into polar coordinates with a revolving voltage indicator for the fundamental oscillation as a measured reference indicator; and monitoring values respectively of at least one voltage indicator for the fundamental oscillation and of at least one voltage indicator for at least one harmonic oscillation to be detected, using a state monitor; as well as updating the monitored values according to the measured reference indicator.