ABSTRACT With fast growing renewable generations, source‐grid‐load‐storage (SGLS) integrated systems have emerged in recent years. The economical feasibility of SGLS system is still a challenge in many power systems. This paper proposes a multi‐period source‐storage coordinated planning model for SGLS system project considering spatio‐temporal complementarity and dynamic source cost. In order to capture demand for flexible resource and wind‐solar complementarity, the model develops hourly operation constraints for wind power, photovoltaic output, and load. It incorporates annually changing investment costs for photovoltaic generators, wind turbine, and energy storage, determining the optimal investment timing. A concept of self‐declared capacity is proposed to coordinately minimize the capacity fee by leveraging local resources. Case study with real‐data demonstrates that the proposed model can reduce total life‐cycle costs by 7.54% to 9.67% and capacity costs by approximately 7.6%, compared to the original project, while assisting the main grid in peak shaving and valley filling. The results reveal that wind farms tends to be built in the early stages, while PV generator and energy storage tend to defer investments. A high proportion of PV generator has seen an increase in the share of energy storage, while energy storage is most sensitive to cost reductions.
Yuankang et al. (Thu,) studied this question.