COMPREHENSIVE CONTROL STRATEGY OF HYBRID ENERGY STORAGE IN PRIMARY FREQUENCY REGULATION CONSIDERING DEMANDS OF FREQUENCY REGULATION STAGES

He Li; Guo Luoquan; Tan Zhuangxi; Li Xinran; Huang Jiyuan; Chen Chaoyang

doi:10.19912/j.0254-0096.tynxb.2023-1580

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (9) : 697-708. DOI: 10.19912/j.0254-0096.tynxb.2023-1580

COMPREHENSIVE CONTROL STRATEGY OF HYBRID ENERGY STORAGE IN PRIMARY FREQUENCY REGULATION CONSIDERING DEMANDS OF FREQUENCY REGULATION STAGES

He Li¹, Guo Luoquan¹, Tan Zhuangxi¹, Li Xinran², Huang Jiyuan³, Chen Chaoyang¹

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Abstract

To meet the fast recovery demand in frequency dynamics, a comprehensive primary frequency regulation strategy is proposed for hybrid energy storage, which fully considers the requirements of different frequency regulation stages. Firstly, the response characteristics of power grid frequency regulation are studied, the dynamic process of frequency regulation is quantitatively analyzed, and the influence of inertia coefficient on the dynamic performance of frequency change is revealed. Secondly, based on the different needs of frequency deterioration and recovery stages, the droop and variable inertia integrated control strategy is proposed based on the needs of different frequency regulation stages to improve the frequency dynamic performance of the system, and the determination methods of coefficients are given from two aspects of system stability and energy storage safe operation. Furthermore, the configuration method of hybrid energy storage capacity is given. Finally, the frequency regulation model of typical regional power grid is built, based on which the simulation is carried out with different power fluctuation conditions, and the capacity configuration is compared with different types of energy storage combinations. The results show that the proposed control strategy can effectively improve the frequency regulation effects of the energy storage, reduce the possibility of frequency exceeding the limit, enhance the stability margin of the system frequency operation, and features good operational economy, so it has certain technical and economic practical value.

Key words

primary frequency regulation / virtual droop / virtual inertia / hybrid energy storage / inertial response / capacity allocation

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He Li, Guo Luoquan, Tan Zhuangxi, Li Xinran, Huang Jiyuan, Chen Chaoyang. COMPREHENSIVE CONTROL STRATEGY OF HYBRID ENERGY STORAGE IN PRIMARY FREQUENCY REGULATION CONSIDERING DEMANDS OF FREQUENCY REGULATION STAGES[J]. Acta Energiae Solaris Sinica. 2024, 45(9): 697-708 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1580

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