Detection, classification & characterisation of voltage sag

Abstract

In this paper, voltage sag due to power system faults such as three-phase-to-ground, single-phase-to-ground, phase-to-phase and two-phase-to-ground are created in transmission line model for generation of different types of voltage sag. This paper describes a methodology for voltage sag generation using Matlab/Simulink. It includes fault simulations for generation of different types of voltage sag using MATLAB Simulink, based on the Sim Power Systems toolbox. This paper summarizes the results from a number of different voltage sag investigations. These investigations involve characterizing the voltage sag performance at a customer facility and evaluating equipment sensitivity to different voltage sag magnitudes and durations. Voltage sags are normally described by magnitude variation and duration. This paper describes generation of voltage sags and classification of voltage sags. It gives the detail idea of how voltage sags are produced and their effects on the electronics and electrical equipments. It described the basic reasons behind the interruption, damage and improper operation of equipments due to voltage sags.