海上风电制氢有助于解决海上风电消纳和远海输电难题，但目前的仿真缺乏海上环境对制氢影响的模拟，限制了相关研究与教学发展，因此亟需开发充分考虑海洋环境载荷的海上风电离网制氢仿真实验平台。该文将风机一体化仿真工具 FAST 和 MATLAB/Simulink 电力系统工具箱相结合，实现海上风机与发电机的联合仿真，在 MATLAB 内部通过设计接口实现电力系统与数学模型的两工具箱的联合仿真，以此构建两软件三工具箱联合的海上风电离网制氢一体化仿真实验平台。仿真结果表明，该平台能实现漂浮式海上风电离网制氢联合仿真，可为海上风电制氢有关研究和实验教学提供有力支撑。
Co-simulation experiment platform for floating offshore wind power off-grid hydrogen production
[Objective]Hydrogen production from offshore wind power is an effective way to address the issues surrounding large-scale grid-connected offshore wind power,including the high cost of power delivery in the deep and distant sea.However,the current status of simulation research is directed either toward onshore wind power hydrogen production scenarios or the simulation of isolated offshore wind power platforms.The research is relatively somewhat unidirectional,and it cannot reflect the impact of the complex offshore environment on the hydrogen production system.This has facilitated an urgent need to develop a full consideration of the marine environment loads of the offshore wind power off-grid hydrogen production simulation experimental platform.[Methods]In this paper,tools integrated into a wind turbine system,in particular,the simulation tools FAST and MATLAB/Simulink power system toolbox,are combined to achieve the joint simulation of offshore wind turbines and wind turbine generators.This experimental platform adopts the S-function interface to achieve the interaction between the two simulation environments;the current-type ideal transformer interface is used in MATLAB to achieve the joint simulation of the power system and mathematical model of the two toolboxes to construct an integrated simulation experimental platform for offshore wind power off-grid hydrogen production based on the combination of two software and three toolboxes.In this study,the NERL 5MW horizontal axis wind turbine and semi-submersible floating platform are selected on the FAST side.The wind-power off-grid hydrogen production system is connected to the Simulink side to simulate and analyze the dynamic response of the floating wind-power platform and the working state of the hydrogen production system under four different working conditions.[Results]The results of the dynamic response under four working conditions show that the vertical oscillatory motion of the wind turbine platform is primarily affected by waves,while the impact of wind is negligible.On the contrary,the transverse rocking,bow rocking,and transverse oscillatory motions are mainly driven by wind,and the effect of waves is relatively weak.In addition,the longitudinal rocking and swinging of the platform are more significantly affected by both the wind and waves.The wind affects the trend and frequency of the longitudinal motion,while the addition of waves induces high-frequency oscillations,which makes the free motion of the platform more complicated and uncertain.Moreover,the effects of waves and turbulent wind on the platform as a whole are not simply a linear superposition,and the interaction may lead to the cancellation of each other's effects,thus suppressing the overall effect on the platform.Therefore,when studying the dynamic response of wind power generation platforms,the composite effects of waves and turbulent winds must be considered to more accurately study the motion of the platform.The wind and waves at sea will not only affect the motion of the platform but also interfere with the operation of the hydrogen production system.Furthermore,the output power of the wind turbine will have a direct impact on the working condition of the hydrogen system,thus affecting the hydrogen production rate and hydrogen production efficiency.A comparison between the two revealed that an increase in the hydrogen production rate may be accompanied by a decrease in the efficiency of the hydrogen production.This may be attributed to the large overpotential generated during the electrolysis of the high-current-density electrolysis process,which leads to an increase in energy loss.This subsequently leads to an increase in energy loss and a subsequent rise in the energy loss.This decrease in efficiency may be attributed to the high overpotential generated during electrolysis at higher current densities,which leads to increased energy loss and reduced hydrogen production efficiency.[Conclusions]During the design and operation of wind turbine and hydrogen production system integration,it is necessary to fully consider the effect of the offshore wind and wave environment on the hydrogen production system,balance the relationship between the hydrogen production rate and efficiency,and achieve the goal of efficient conversion and utilization of wind energy through technological innovation and system optimization.The established simulation model and the simulation results obtained in this study can not only provide strong support for the research and experimental teaching but also provide a certain reference for the design and operation of offshore wind power hydrogen production systems.
wind power off-grid hydrogen production simulationfloating offshore wind powerFAST and MATLAB co-simulationpower and hydrogen production cross-box co-simulation interface
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