Design and Development of Sag & Swell Hybrid Compensator for Voltage Flickering in Grid Loads

Abstract

This paper presents power quality for industrial power distribution system due major sensitive loads arises on voltage sag and swell. The proposed compensator system decreases the size of power electronic components and reducing voltage stress. Flicker issues affect the power factor of electrical system; a proposed system design is maintain a constant power factor by minimizing the sag and swells components on the load side which reduces current ripple in power delivered to load. The control on compensation voltages are fed using solar PV panel power stored in the battery. The design of STATCOM parameters are considered an optimization problem according to the time domain-based objective function solved by optimization firefly algorithm. Excessive power generation and swell power is cut-off and fed into battery by proposed converter system. The system has a minimum number of switches during computation and conducting time of voltage sag and swell which reduces overall power electronic switches power losses. Initially proposed system is validated using MATLAB-SIMULINK and experimentally validated using a prototype of the digital SpicProgrammable Interface Controller.

 Keywords: sag; swell; compensator; flicker; MATLAB; dSPIC.