Topological Scheme and Analysis of Operation Characteristics for Medium-Voltage DC Wind Turbine Photovoltaic Powered Off-Grid Hydrogen Production System

Jie Zhang, Fei Xiao, Fan Ma (), Xiaoliang Hao and Runlong Xiao
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Jie Zhang: National Key Laboratory of Electromagnetic Energy, Naval University of Engineering, Wuhan 430033, China
Fei Xiao: National Key Laboratory of Electromagnetic Energy, Naval University of Engineering, Wuhan 430033, China
Fan Ma: National Key Laboratory of Electromagnetic Energy, Naval University of Engineering, Wuhan 430033, China
Xiaoliang Hao: National Key Laboratory of Electromagnetic Energy, Naval University of Engineering, Wuhan 430033, China
Runlong Xiao: National Key Laboratory of Electromagnetic Energy, Naval University of Engineering, Wuhan 430033, China

Energies, 2025, vol. 18, issue 3, 1-20

Abstract: Renewable energy has high volatility in the traditional off-grid AC hydrogen (H 2 ) production system, which leads to low reliability of the system operation. To address this issue, this paper designs the topology scheme of wind-photovoltaic generation powered off-grid H 2 production system. Firstly, a DC off-grid system topology scheme with the wind turbine (WT) and photovoltaic (PV) is connected to the medium voltage DC bus by two-stage conversion is proposed. The power fluctuation of WT and PV generation systems and the power-adjustable characteristics of electrolyzers are taken into consideration. Meanwhile, the scheme of distributed access of energy storage (ES) to the WT side and PV side to provide the voltage support for the system is proposed. Secondly, the operating characteristics of DC microgrids and AC microgrids under abnormal operating conditions, such as the fault of the source side, the fault of the load side, and communication interruption, are analyzed in this paper. Finally, the electromagnetic transient simulation model of the DC off-grid H 2 production system and the traditional AC off-grid H 2 production system is established. The effectiveness of the proposed topology scheme is verified by simulation of typical operating conditions.

Keywords: DC off-grid hydrogen production; topological scheme; analysis of operating characteristics; communication interruption (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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