Adaptive Power Control Strategy of Grid-Forming Converters for Transient Stability Enhancement

In power systems with high penetration of power converter-based renewable generator units, stability issues, particularly transient instability, can arise. While previous research has primarily focused on the transient stability of single types of grid converters, there is a lack of study on the interactions between different types of converters, such as grid-forming (GFM) and grid-following (GFL) converters. Additionally, the stabilizing control strategy for hybrid types of converters is not fully explored. This paper proposes an aggregated nonlinear model of GFL converters and GFM converters hybrid system and analyze the transient stability of it. Through analysis, a stabilizing control strategy is proposed specifically for the GFM converters, aiming to improve the overall system stability.