Abstract: Remote renewable energy bases often lack conventional power sources for support, leading to prominent frequency stability issues. The deployment of grid-forming energy storage systems can effectively enhance frequency stability. However, fixed frequency support parameter settings fail to fully utilize the frequency regulation capability of grid-forming energy storage, resulting in increased configuration requirements to maintain frequency stability. To address this, a bi-level optimization configuration method for grid-forming energy storage is proposed, based on frequency security in renewable energy bases, which considers the optimization of inertia response and primary frequency regulation parameters. The upper-level optimization aims for economic optimality, deriving the grid-forming energy storage configuration scheme while accounting for operational constraints under typical scenarios of renewable energy HVDC transmission. The lower-level optimization targets multiple frequency security metrics under anticipated power disturbances, optimizing the inertia response and primary frequency regulation parameters of the energy storage system. This ensures the frequency stability of the configuration scheme while maximizing the frequency support capability of grid-forming energy storage. Finally, the effectiveness of the proposed optimization method is validated using historical data from a typical scenario in Northwest China.