Planning methods for high penetration renewable energy systems considering flexibility requirements

In the context of power system planning with a high penetration of renewable energy, this study emphasizes the pivotal role of coordinated optimization of generation-load-storage flexibility resources. The primary objectives are to enhance system flexibility, foster renewable energy integration, and achieve the "dual carbon" goals. Guided by an analysis of flexibility supply and demand, we propose a multi-time scale coordinated planning approach that integrates planning decisions and operational simulations while factoring in the benefits of flexibility resources and carbon trading. To streamline the complexity and ensure holistic planning, a decomposition coordination method paired with multi-stage iterative optimization is employed. Empirical results affirm the efficacy of the proposed approach in elevating resource utilization efficiency. Concurrently, it caters to the economic and environmental aspirations of the system, bolstering the integration capacity of renewable energy.