INDEPENDENT ENERGY STORAGE STATION CAPACITY PLANNING FOR ASSISTING GRID SECONDARY FREQUENCY REGULATION

Xu Qingxiang; Teng Wei; Ding Xian; Ma Zhiyong; Liu Yibing

doi:10.19912/j.0254-0096.tynxb.2025-0677

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (9) : 40-49. DOI: 10.19912/j.0254-0096.tynxb.2025-0677

INDEPENDENT ENERGY STORAGE STATION CAPACITY PLANNING FOR ASSISTING GRID SECONDARY FREQUENCY REGULATION

Xu Qingxiang¹, Teng Wei¹, Ding Xian², Ma Zhiyong¹, Liu Yibing¹

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Abstract

Using electrochemical energy storage, flywheels, and other medium- and short-term storage systems as independent entities to participate in grid frequency regulation can effectively reduce the frequent load adjustment demands of thermal power plants and increase the flexibility of frequency regulation. Currently, there is a lack of reasonable planning methods for the power and capacity of independent energy storage stations participating in secondary frequency regulation ancillary services. This paper determines the output curves of all grid-connected entities by using day-ahead scheduling plans and intra-day rolling optimization, thereby establishing the benchmark operating point for frequency regulation resources. This paper then constructs a multi-objective function that includes frequency stability and economic indicators of the power grid, establishes a regional power grid secondary frequency regulation model with energy storage participation, obtain real-time frequency regulation demand of the power grid, and determines the optimal capacity planning of independent energy storage power stations under different levels of participation. Finally, through case models on multiple time scales, the proposed strategy is verified to achieve the economic and security benefits of independent energy storage stations assisting with grid secondary frequency regulation.

Key words

energy storage / secondary frequency regulation / electric power system economics / independent energy storage station / capacity configuration

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Xu Qingxiang, Teng Wei, Ding Xian, Ma Zhiyong, Liu Yibing. INDEPENDENT ENERGY STORAGE STATION CAPACITY PLANNING FOR ASSISTING GRID SECONDARY FREQUENCY REGULATION[J]. Acta Energiae Solaris Sinica. 2026, 47(9): 40-49 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0677

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