Power Quality Improvement Using Dynamic Voltage Restorer in Distribution System
DOI:
https://doi.org/10.54554/ijeeas.2026.9.01.007Abstract
This study evaluates the application of Dynamic Voltage Restorer (DVR) technology to mitigate power quality disturbances in electrical distribution systems. Using PSCAD simulation software, the research analyzes the mitigation of voltage sags and harmonics during symmetrical (three-phase-to-ground) and asymmetrical (single line-to-ground) faults. The DVR utilizes a Proportional-Integral (PI) controller and Pulse Width Modulation (PWM) to inject compensating voltages through an injection transformer. Results quantify the restoration of load-side voltage from a $34\%$ sag to nearly nominal levels. This paper addresses previous limitations by providing a quantitative performance summary and outlining future research directions for modern grid resilience.
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