OPTIMAL CONTROL OF DC MICROGRID FOR GREEN TUGBOAT BASED ON HYBRID ENERGY STORAGE

Cheng Peng; Di Xiaoheng; Xia Baolong; Pan Tao; Qin Lin

doi:10.19912/j.0254-0096.tynxb.2024-1231

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (11) : 109-118. DOI: 10.19912/j.0254-0096.tynxb.2024-1231

OPTIMAL CONTROL OF DC MICROGRID FOR GREEN TUGBOAT BASED ON HYBRID ENERGY STORAGE

Cheng Peng¹, Di Xiaoheng¹, Xia Baolong¹, Pan Tao^1,2, Qin Lin^1,3

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Abstract

To solve the issues posed by excessive DC bus voltage fluctuations in power systems and short-term overloads in diesel generator sets and energy storage systems, a control strategy that integrates droop control with voltage compensation and virtual DC generator control into hybrid energy storage systems is proposed for green tugboat operations. Firstly, a theoretical analysis of the control strategy is presented. Subsequently, a hybrid energy storage system model is constructed in Matlab/Simulink to simulate and verify the feasibility of the control strategy. Finally, the control strategy is integrated into the green tugboat power system to conduct simulation experiments. The results demonstrate that the green tugboat's diesel generator set, which incorporates the hybrid energy storage control strategy, is capable of continuously outputting economical power under all operating conditions except the mooring condition. Furthermore, the DC bus voltage reains at the rated voltage of 1000 V in steady state. Additionally, the voltage fluctuation in the transient process is less than 1.5%. The proposed control strategy has been shown to significantly enhance the safety and stability of the green tugboat power system.

Key words

microgrids / energy storage / DC generator motors / droop control / supercapacitor

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Cheng Peng, Di Xiaoheng, Xia Baolong, Pan Tao, Qin Lin. OPTIMAL CONTROL OF DC MICROGRID FOR GREEN TUGBOAT BASED ON HYBRID ENERGY STORAGE[J]. Acta Energiae Solaris Sinica. 2025, 46(11): 109-118 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1231

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