Development of a primary frequency regulation capability evaluation index for wind-solar-storage systems based on the entropy weight method

With the deepening of the construction of the new power system, the penetration rate of new energy in the power system continues to increase significantly. However, the traditional assessment of the ability of new energy (wind, solar, and storage) to participate in the primary frequency response (PFR) of the system exhibits limitations due to the diffi-culty in fully considering their differentiated characteristics. Therefore, this study develops a comprehensive evaluation index system for the PFR performance of wind-solar-storage new energy systems based on the entropy weight method. This system fully incorporates the characteristics of wind power generation, photovoltaic power generation, and energy storage systems in terms of frequency response and operational constraints, establishing overall PFR capability evaluation indicators of the system, as well as specialized and re-fined evaluation indicators for each technology. Simulation results demonstrated the meth-odology's effectiveness, demonstrating its capability to accurately assess frequency regula-tion capacities while considering the distinct operational characteristics of wind, solar, and storage technologies. These findings provide theoretical guidance for optimizing frequency regulation resource allocation and operational strategies in renewable-dominated power systems.