Under the drive of the “dual-carbon” goals, constructing an integrated wind-solar-storage base is a critical pathway for promoting the green and low-carbon transformation of the energy sector. A planning methodology that couples the spatio-temporal characteristics of wind and solar resources with a coordinated hybrid energy storage strategy is proposed. The capacity scales of photovoltaic, wind power, and energy storage are treated as decision variables. A complementary model is constructed with the optimization objective of matching the power delivery curve. Feasible configuration schemes are screened through annual chronological production simulation and subsequently compared and selected using an economic evaluation model. A study on capacity planning and generation configuration decision-making is conducted. The study derives an economically optimal planning scheme for the integrated base, which can effectively utilize the region’s wind power peak periods and midday photovoltaic output characteristics. Through hierarchical dispatch of energy storage, the scheme reduces the curtailment rate of renewable energy in the outbound transmission channels.