Power quality enhancement using SVPWM Z-source inverter based DVRPower quality enhancement using SVPWM Z-source inverter based DVR

Abstract

Power quality issues are a major concern in modern electrical grids, particularly with the increasing integration of renewable energy sources and sensitive electronic equipment. Dynamic Voltage Restorers (DVR) have emerged as a potent solution for mitigating voltage sags, swells, and interruptions. This paper introduces a novel approach to enhance power quality using a Z-source inverter (ZSI) based DVR, employing Space Vector Pulse Width Modulation (SVPWM) techniques. The ZSI offers unique advantages in this application, including the ability to boost voltage without the need for additional DC-DC converters and the capability to operate under various load conditions. We present a comprehensive design and simulation of the SVPWM Z-source inverter, detailing its configuration, control strategy, and integration within a DVR system. Simulation results demonstrate that the proposed DVR configuration effectively compensates for voltage disturbances, thereby stabilizing the load voltage and improving the overall system performance. Comparative analyses highlight the superiority of the Z-source inverter over traditional inverter designs, showing significant improvements in efficiency and reliability. This study confirms that SVPWM Z-source inverter based DVRs can offer a robust and efficient solution for enhancing power quality in contemporary power systems.