Innovative Systemic Control of Grid-Edge Inverters in Distribution Grids for Enhanced Grid Services

Distributed Energy Resources (DERs), particularly inverter-based energy resources, are critical for achieving decarbonized power systems. However, their stable integration into weak distribution networks presents significant challenges. To address these challenges, this thesis develops a comprehensive, multi-layered control framework that enhances the performance and resilience of grid-edge inverters. Specifically, it proposes an innovative systematic methodology to improve the grid services of grid-forming inverters, ensuring robust performance under complex grid conditions. This methodology demonstrates broad applicability across various grid-forming technologies and renewable energy plants, highlighting its scalability. Furthermore, a novel coordination strategy is developed to enable effective operation of inverter-based energy resources. To further strengthen system adaptability, AI-enhanced methods are incorporated to improve system resilience. These methods are validated to effectively improve the overall resilience and performance of modern distribution grids.