METHOD FOR DETECTING UNBALANCE IN A 3-PHASE VOLTAGE SIGNAL AND UNBALANCE DETECTOR

摘要

A method for detecting unbalance in a 3-phase voltage signal is disclosed. The method includes determining an unbalance indicator (210) as a value of a square of an amplitude of a positive sequence of the voltage signal (215); and comparing the unbalance indicator (220) with a threshold (235) to determine unbalance of the voltage signal. Further, an unbalance detector is also disclosed.