33kV Distribution Feeder Line Sag and Swell Mitigation using Customized DVR

Abstract

This study modelled a power distribution system with and without incorporating a Dynamic Voltage Restorer (DVR). It investigated the performance of DVR operation in load voltage compensation under voltage sags and swells conditions. This was to provide insight into how DVR will enhance the reliability and quality of power delivered to the end-user with sensitive equipment in the face of voltage disturbances in the system. An industrial 33kV BEDC Electricity Distribution Plc distribution feeder was modelled in MATLAB SIMULINK. DVR is a series-connected custom power device compensating for distribution system voltage sags and swells. The simulation result attests to the performance of the DVR configuration in mitigating voltage disturbances in a typical distribution feeder under both balanced and unbalanced fault (sags/swells) conditions in a medium-level distribution system and enhancing voltage quality and reliability at the customer side to a statutory voltage level.