Phase based-voltage dip classification using a new classification Algorithm

This paper is concerned with the development and implementation of an improved algorithm for dip classification. It can determine the type of dip based on the difference in phase angle between the measured voltages using Zinari´s Algorithm. The improved algorithm overcomes the shortcomings of existing conventional dip classification methods which are based solely on the duration and magnitude of the voltage deviation. A software program was developed using Matlab/Simulink and the performance of the algorithm was checked over the full range of phase shift and dip magnitude. Moreover, the algorithm was implemented in a laboratory set up, and various dip types were simulated and then classified using the improved algorithm.