共 28 条
Optimal sizing of hybrid energy storage system considering power smoothing and transient frequency regulation
被引:28
作者:
Cao, Yongji
[1
]
Wu, Qiuwei
[2
]
Zhang, Hengxu
[3
]
Li, Changgang
[3
]
机构:
[1] Tech Univ Denmark, Ctr Elect Power & Energy, Dept Elect Engn, DK-2800 Lyngby, Denmark
[2] Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China
[3] Shandong Univ, Key Lab Power Syst Intelligent Dispatch Control Mi, Jinan 250061, Peoples R China
关键词:
Frequency stability;
Hybrid energy storage system;
Power smoothing;
System frequency response model;
STRATEGY;
D O I:
10.1016/j.ijepes.2022.108227
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
The increasing integration of renewable energy sources (RESs) poses challenges of active power balance in both the normal operating states and contingencies. The hybrid energy storage system (HESS) consisting of the battery and supercapacitor is flexible, and can provide additional regulation capability. This paper proposes an optimal sizing scheme for the HESS considering power smoothing in steady-state operation and transient frequency regulation after disturbances. First, the output power of RESs is decomposed by the discrete wavelet transform, and the low-and high-frequency fluctuations are separately allocated to the battery and supercapacitor for smoothing. Then, an extended system frequency response model is developed for estimating the required tran-sient frequency regulation capability (TFRC) of the HESS to arrest frequency excursion in contingencies. Furthermore, taking into account the fluctuation smoothing, required TFRC and investment cost, a multi-objective optimization model is established to optimize the size of the HESS. Additionally, the linear weighted method and generalized Benders decomposition are utilized to divide the optimization model into two stages, where a master problem and two subproblems are solved iteratively. A case study is conducted to validate the proposed scheme, showing high cost efficiency, and superior performance in smoothing power fluctuation and improving frequency nadir.
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页数:10
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