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International Journal of Frontiers in Engineering Technology, 2023, 5(1); doi: 10.25236/IJFET.2023.050104.

Optimization of hybrid energy storage based on micro grid optical storage and DC in certain regions


Lu Tianqi, Gao Jing, Zhu Heyan, Yang Guochen

Corresponding Author:
Lu Tianqi

State Grid Liaoning Electric Power CO, LTD., Power Electric Research Institute, Shenyang 110015, China


It is of great significance to maintain the stability of DC micro grid bus voltage and improve the economic benefits of the micro grid system. A hybrid energy storage form of flywheel and battery is proposed as the energy storage form of the DC micro grid system of the optical storage charging station. The flywheel is used to smooth high-frequency power fluctuation and part of low-frequency power, and the battery is used to balance the reference power to maintain smooth and stable bus voltage. The hierarchical coordinated control strategy of DC bus is designed to achieve the coordinated control of photovoltaic power generation, electric vehicle charging and discharging, and load power demand in the microgrid system. According to the different working conditions of island operation and grid connected operation, the proposed control strategy is simulated and analyzed on the Matlab/Simulink software platform. The simulation results show that under all working conditions, the proposed control strategy can effectively switch the DC bus voltage between different voltage layers, maintain the DC bus voltage balance of the DC microgrid system of the optical storage charging station, and realize the flexible and reliable operation of the entire system. Therefore, the control strategy is feasible and effective.


PV; DC microgrid; Hierarchical control; Coordinated control; Droop control

Cite This Paper

Lu Tianqi, Gao Jing, Zhu Heyan, Yang Guochen. Optimization of hybrid energy storage based on micro grid optical storage and DC in certain regions. International Journal of Frontiers in Engineering Technology (2023), Vol. 5, Issue 1: 20-24. https://doi.org/10.25236/IJFET.2023.050104.


[1] WANG Yi, ZHANG Lirong, LI Heming, et al. Hierarchical coordinated control of wind turbine-based DC microgrid [J].  Proceedings of the CSEE, 2013, 33(4): 16-24. 

[2] Liu X, Wang P, Loh P C. A hybrid AC/DC microgrid and its coordination control[J].  IEEE Transactions on Smart Grid, 2011, 2(2): 278-286. 

[3] ZHU Xiaorong, ZHANG Huihui.  Reasearch on coordinated DC voltage control strategy of DC microgrid based on photovoltaic generation [J].  Modern Electric Power, 2014, 31(5): 21-26. 

[4] QIN Wenping, LIU Xuesong, HAN Xiaoqing, et al. An improved control strategy of automatic charging/discharging of energy storage system in DC microgrid[J].  Power System Technology, 2014, 38(7): 1827-1834. 

[5] ZHANG Ye, GUO Li, JIA Hongjie, et al. An energy storage control method based on state of charge and variable filter time constant[J]. Automation of Electric Power Systems, 2012, 36(6): 34-38. 

[6] LU Xiaonan, SUN Kai, HUANG Lipei, et al. Dynamic load power sharing method with elimination of bus voltage deviation for energy storage systems in DC micro-grids[J].  Proceedings of the CSEE, 2013, 33(16): 37-46. 

[7] LI Junhui, MU Gang, CUI Xinzhen, et al. Control strategy design of dual lithium battery-capacitor hybrid energy storage system[J].  High Voltage Engineering, 2015, 41(10): 3224-3232. 

[8] LI Xiao, HU Changsheng, LIU Changjin, et al. Modelling and controlling of SCES based wind farm power regulation system [J]. Automation of Electric Power Systems, 2009, 33(9): 86-90. 

[9] Sundararagavan S, Baker E. Evaluating energy storage technologies for wind power integration [J].  Solar Energy, 2012, 86(9): 2707-2717. 

[10] Weissbach R S, Karady G G, Farmer R G. A combined uninterruptible power supply and dynamic voltage compensator using a flywheel energy storage system [J].  IEEE Transactions on Power Delivery, 2001, 16(2): 265-270.