This paper develops a capacity optimization model for a wind–solar–hydro–storage multi-energy complementary system. The objectives are to improve net system income, reduce wind and solar curtailment, and mitigate intraday fluctuations. With vast, untapped renewable resources, East Asia can accelerate its clean energy transition—boosting competitiveness, creating millions of jobs, and strengthening energy security. A new World Bank report charts how. East Asia's industrial rise has been powered by coal in recent decades -. In order to reduce carbon emissions, promote the realization of the “double carbon” goal, and improve the level of clean energy utilization and the operating efficiency of the power system, a wind-light-water storage complementary power generation system is built, and a mathematical model of multi. Wind–solar–hydro–storage multi-energy complementary systems, especially joint dispatching strategies, have attracted wide attention due to their ability to coordinate the advantages of different resources and enhance both flexibility and economic efficiency. According t Multi energy complementarity focuses on achieving multi energy complementarity and. Land-based wind–solar complementarity is well established, but its marine counterpart remains underexplored as renewable energy development transitions from land to the ocean.