Joint Planning Strategy of New Energy and Energy Storage Under Regional Low-Carbon Policy

With the continuous expansion of China's new energy grid scale, the intermittency and unpredictability of its output pose significant challenges to the stable operation of the grid. Long-term energy storage is utilized to provide sustained and stable power output during extreme weather or energy supply shortages, while short-term energy storage responds rapidly to peaks and valleys in power demand to ensure grid stability. To address this, this paper proposes a joint planning strategy for new energy, short-term, and long-term energy storage, considering regional low-carbon constraints. Firstly, the paper analyzes the impact of low-carbon policies on the joint planning of new energy and short-term/long-term energy storage from multiple perspectives. Then, based on the consideration of low-carbon constraints, a joint planning model for new energy and short-term and long-term energy storage is established to meet the capacity requirements under different carbon emission constraints. Finally, a case study in selected regions of China indicates a significant increase in the demand for long-term energy storage when the carbon emission rate is below 40%. The results also demonstrate that the impact of varying low-carbon constraints on the installed capacity of new energy differs across regions, validating the effectiveness of the proposed joint planning model under low-carbon constraints and providing insights for such planning in different regions.