Adaptive Frequency Regulation Control Method for Hybrid Renewable Energy Power Plants Based on Disturbance Intensity and Frequency Regulation Capability

The participation of renewable energy power plants in system frequency regulation constitutes a critical measure for enhancing frequency security and stability in power systems with high renewable penetration. However, existing frequency regulation strategies at renewable plants exhibit limited adaptability to diversified grid power disturbances, failing to fully exploit the rapid frequency support capabilities of heterogeneous renewable units. This paper establishes a hybrid renewable power plant integrating wind turbines, PV arrays, and energy storage units, while analyzing prevailing frequency control schemes. Building on this foundation, we develop a system frequency response model incorporating hybrid plant regulation strategies, proposing: 1) a system power disturbance intensity assessment methodology, and 2) an active frequency support control strategy for hybrid plants. The strategy quantifies disturbance intensity via the post-fault maximum Rate-of-Change-of-Frequency (RoCoF), then dynamically coordinates control modes based on per-unit capabilities – including regulation power margins and spinning kinetic energy reserves – thereby maximizing the plant's active frequency support potential. Simulation results demonstrate significant performance advantages over fixed-parameter regulation strategies across varying disturbance scenarios, validating the method's efficacy.