Efficiency Modelling and Analysis of Electrolysis System in Hydrogen-Producing Offshore Wind Turbine

Hydrogen-producing offshore wind turbine (HP-OWT) become an emerging solution for wind power services in offshore scenarios. By integrating the green hydrogen production into the DC link of the HP-OWT, the grid power can be adjusted. The fluctuating wind power may influence the power conversion efficiency of the electrolysis system. This paper studies the electrolysis power conversion efficiency in HP-OWT for grid-injected power smoothing service. The power conversion efficiency model considering converter and electrolysis is first established. Furthermore, the impact of wind fluctuations on efficiency is analyzed. The analysis results show that the efficiency of electrolysis system power conversion can be affected by the amplitude and frequency of wind fluctuation. The power conversion efficiency decreases with the increase of power fluctuation. The analysis results can be applied for efficiency optimization and control of HP-OWT.