RESEARCH ON OPTIMAL ALLOCATION OF ENERGY STORAGE CAPACITY IN ISOLATED MICROGRID UNDER EXTREME SCENARIOS

Dai Qin; Xi Qingyu; Wang Chunxin; Ma Libo

doi:10.19912/j.0254-0096.tynxb.2024-0776

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (9) : 284-292. DOI: 10.19912/j.0254-0096.tynxb.2024-0776

RESEARCH ON OPTIMAL ALLOCATION OF ENERGY STORAGE CAPACITY IN ISOLATED MICROGRID UNDER EXTREME SCENARIOS

Dai Qin¹, Xi Qingyu¹, Wang Chunxin², Ma Libo²

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Abstract

Extreme scenarios are important factors that threaten the economic and stable operation of isolated island microgrids. Taking into account the economic cost of system operation and the constraints on stable operation under extreme scenarios, a method for optimizing the capacity allocation of isolated island microgrids is proposed. First, a two-stage isolated island microgrid energy storage capacity optimization and allocation mathematical model is proposed, with the upper and lower layers constructing the system capacity optimization and allocation model and the operation benefit optimization model, respectively, and the stable operation constraints under extreme scenarios are introduced into the lower operation benefit optimization model in the form of a penalty function. Secondly, in order to ensure the stable operation of the system under the condition of insufficient number of extreme scenario samples, CWGAN-GP is used to construct the extreme scenario generation method, and the extreme scenarios are generated in large quantities to ensure the economy and stability of the results of the optimal allocation of the capacity as much as possible. The proposed method is verified by using the scenario data of isolated island grid collected from a province of Southern Power Grid, and the results show that the optimized energy storage capacity can effectively ensure stable system operation. The power balance violation rate in various operation scenarios is 0, and the investment return ratio can reach 5.53.

Key words

islanding / microgrids / energy storage / extreme weather / scenario generation / capacity optimization allocation

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Dai Qin, Xi Qingyu, Wang Chunxin, Ma Libo. RESEARCH ON OPTIMAL ALLOCATION OF ENERGY STORAGE CAPACITY IN ISOLATED MICROGRID UNDER EXTREME SCENARIOS[J]. Acta Energiae Solaris Sinica. 2025, 46(9): 284-292 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0776

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