Interpretation of China Electricity Council''s 2023 energy storage
In 2023, 9.94GW of large-scale power stations will be put into operation, accounting for 54.89%, compared with 42.63% in 2022, 8.01GW of medium-sized power
Small and medium-sized pumped storage power stations have unique development advantages, and the development and construction of small and medium-sized pumped storage power stations have important practical significance for optimizing the energy structure of Zhejiang Province.
In 2021, the National Energy Administration made it clear in the Medium and Long Term Development Plan for Pumped Storage (2021–2035) that the construction of small and medium-sized pumped storage power stations should be planned according to local conditions in provinces with better resources.
At present, five pumped storage power stations such as Xikou, Tianhuangping and Tongbai have been successfully put into operation, with a total installed capacity of 6.68 million kilowatts.
The existing literature shows that pumped storage power stations can maximize the power balance of regional power grid, ensure the safe and stable operation of regional power grid, and realize the economic optimization of power grid operation through reasonable modeling and new energy distribution schemes.
Small and medium-sized pumped storage power stations have the advantages of short construction period, fast action, relatively low requirements for topography, relatively easy location, relatively low investment, easy layout in load center, flexible operation and fast start-up speed.
Therefore, on the basis of conventional small hydropower, the transformation into a small pumped storage power station or joint operation with pumped storage can reduce the cost, shorten the construction period, solve the problem of site selection, improve the power station output in the dry season, and increase the economic benefits.

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