| الملخص: | With a high penetration of renewable energy, the new power system is facing the challenges of uneven seasonal power supply caused by renewable energy, and the stability of the power supply in the system is threatened. As a new flexible regulation resource, seasonal energy storage can realize long-term and large-scale energy transfer, which can be used to balance the seasonal power outputs. Reasonable allocation of seasonal energy storage at the planning stage can ensure the balance of monthly electricity and reduce the pressure on the power supply. In this paper, a planning method for seasonal energy storage is proposed. Firstly, based on the monthly meteorological information, the seasonal model of renewable energy is established. Then, by taking the minimum annual comprehensive cost of the system as the objective function and considering the operation constraints of various types of power supplies, energy storage planning/operation constraints, and annual/monthly power balance constraints, the seasonal energy storage calculation model is established to calculate the seasonal energy storage capacity. Finally, the 2050 planning scheme of a province in South China is used as an example to verify the effectiveness of the proposed method.
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