Detection of Voltage Flicker Based on Mathematical Morphology Filter and Teager Energy Operator

This paper introduces a new method to track voltage flicker levels in distribution network, which is produced by fluctuating loads like arc furnaces. The proposed method is based on mathematical morphology (MM) filter and Teager Energy Operator (TEO). At first a series MM filter is designed to filter noises such as random noise and impulse noise in voltage flicker signals. Then to the filtered curves, a tracking method based on TEO is adopted to track voltage flicker´s amplitude. Several simulation results are presented to validate the filtering capability of MM filter and the superior performance of TEO to track voltage flicker levels.