Impact of solar photovoltaic injection on power quality covenant university distribution network

Abstract

This study highlights challenges and solutions and examines the effects of injecting Solar Photovoltaic Distributed Generation (PVDG) on Covenant University’s power quality (PQ) distribution network. Injecting solar PVDG helps the University to reduce grid dependency, lower carbon emissions, and improve energy efficiency. Real-time data of power quality parameters were collected using a 434 series II power analyser over 7 days, including weekdays and weekends during peak and off-peak hours. And the data were compared with IEEE standards. Simulation and analysis were done using both Neplan and Homer. Homer Pro was used to optimize PVDG integration, while Neplan was used for the load flow and harmonic analysis. The significant PQ disturbances identified include voltage imbalances, high total harmonic distortion (THD), and overloads. To address these issues, advanced compensation improvements were made using Unified Power Flow Controllers (UPFC) and Static Synchronous Compensator (STATCOM). Postinjection of the solar PVDG results showed a 0.89 % reduction in active power losses, a 1.3 % improment in power factor (PF), and a 15.6 % decrease in the source current at the 33 kV feeder. The results underscore the importance of optimized solar PVDG injection to maintain power quality and enhance network efficiency