Grid-Forming energy storage configuration method considering constraints of multiple renewable stations short-Circuit ratio

Grid-Forming Energy Storage (GFMES) can mitigate the stability issues induced by the large-scale integration of grid-following renewable sources. Therefore, this paper proposes a calculation method for the multiple renewable stations short-circuit ratio (MRSCR) that accounts for GFMES, and establishes a GFMES planning model with MRSCR constraints. First, based on the characteristics of GFMES, an MRSCR calculation method accounting for the overload capacity of GFMES and a critical short-circuit ratio (CSCR) calculation method for the combined system of GFMES and renewable are proposed. Second, the siting of GFMES is guided by evaluating the MRSCR of renewable nodes, and the capacity of GFMES is planned with the goal of minimizing the total cost. Case study results demonstrate that the proposed method is effective for most power grid structures, can effectively identify the weak nodes of the system, improving the system MRSCR by 10.14% and reducing operation cost by 19.99%.