Grid-Forming Control for Enhanced Active Grid Support

This document, presented by Xiong Xiaoling from North China Electric Power University, explores grid-forming (GFM) control technology to enhance active grid support capability in new power systems with high renewable energy penetration. It highlights challenges such as insufficient inertia and voltage support due to the displacement of synchronous generators by power electronic converters. The report defines GFM converters as synchronous voltage sources considering power and current constraints, and discusses key issues including wide-range short-circuit ratio (SCR) adaptability, transient overcurrent, and power angle synchronization during faults. It also analyzes small-signal stability risks like synchronous frequency resonance (SFR) in power-synchronized GFM converters, emphasizing the need for control frameworks that balance current limiting, SCR adaptability, and seamless grid-connected/islanding switching. The findings aim to guide the development of robust GFM solutions for future power systems.