MEASUREMENT AND PREDICTION OF VOLTAGE FLICKER MAGNITUDE AND FREQUENCY

Voltage nicker refers to a slow-0.5 to 30 Hz--modulation of the voltag e magnitude. This periodic fluctuation can be modelled as an amplitude modulated signal, where the fundamental power Frequency represents th e carrier signal and the voltage flicker represents the modulating sig nal. An algorithm based on this premise is developed to estimate the i nstantaneous magnitude and frequency of the voltage flicker. The algor ithm, which is based on Kalman filter estimation, can also be used to predict the instantaneous nicker level.