Research on Coordinated Frequency Control of Thermal Power-flywheel Energy Storage System Based on the Real-time Prediction of Output Increment

被引：1
|
作者：
Hong F. [1 ]
Liang L. [1 ]
Pang Y. [1 ]
Fang F. [1 ]
Liu J. [1 ]
机构：
[1] State Key Lab of Alternate Electric Power System With Renewable Energy Sources (North China Electric Power University), Changping District, Beijing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 21期
基金：
中国国家自然科学基金;
关键词：
coordinated control; flywheel energy storage; frequency modulation; output prediction;
D O I：
10.13334/j.0258-8013.pcsee.2222304
中图分类号：
学科分类号：
摘要：
With the large-scale grid integration of renewable energy, the frequency security of power system has been severely challenged. Fully exploiting the frequency modulation resources on the power supply side can improve the supporting capacity of power grid, which has great significance. The modern power system will seriously damage the safety and economy of the unit operation; the combined frequency modulation of the thermal power unit and flywheel energy storage can solve the problems effectively. As the main force of power grid frequency modulation, the dynamic characteristics of thermal power units are complex, and the frequency modulation capability varies greatly under different dynamic conditions, which influences the cooperative output of the combined frequency modulation system. Therefore, this paper proposes a quantitative prediction model of real-time output increment, and designs a coordinated frequency modulation control strategy for thermal power-flywheel energy storage system. This strategy could adaptively adjust the flywheel energy storage output under dynamic conditions. The simulation results verify that the proposed model can accurately predict the frequency modulation capability of the unit under dynamic conditions. The proposed strategy could improve the grid frequency modulation effect. Compared with traditional droop control, the maximum frequency deviation of the system is reduced by 32%, and the steady-state deviation is decreased by about 30%, respectively. The output fluctuation of thermal power unit is reduced by 26%, which is beneficial to the safety and stability of thermal power units. ©2023 Chin.Soc.for Elec.Eng.
引用
收藏
页码：8366 / 8377
页数：11
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