Research: Impact of Smart Inverter Controls on Voltage Regulation for Grid-Connected Ro...

Research question: How do advanced smart inverter control strategies affect voltage regulation and stability in low-voltage distribution grids with high rooftop solar PV penetration?

Background & Motivation: The rapid increase in rooftop solar photovoltaic (PV) installations has transformed traditional low-voltage distribution grids, introducing new challenges in voltage regulation and grid stability. Smart inverters, with advanced grid-support functionalities, promise to mitigate these challenges through autonomous voltage and reactive power control.

Research Gap: Despite substantial progress, there is limited quantitative understanding of how specific smart inverter control algorithms (such as Volt/VAR, Volt/Watt) influence voltage profiles and stability at high PV penetration levels, especially under real-world load and generation variability.

Approach & Expected Contribution: This research will review state-of-the-art inverter control schemes, develop a simulation-based methodology using IEEE distribution test feeders, and systematically evaluate voltage regulation performance across different scenarios. The expected contribution is a comparative analysis of control strategies, identification of optimal settings, and guidelines for practical grid integration.

Significance: The findings support utilities and policymakers in updating interconnection standards, enhancing grid reliability, and accelerating the integration of distributed renewable energy sources.