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Start-Up and Fault-Ride-Through Strategy for Offshore Wind Power via DRU-HVDC Transmission System

Author

Listed:
  • Yiting Zhang

    (School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China)

  • Wenjiang Zhu

    (China Nuclear Power Technology Research Institute Co., Ltd., Shenzhen 518031, China)

  • Cheng Tang

    (China Nuclear Power Technology Research Institute Co., Ltd., Shenzhen 518031, China)

  • Ni Liu

    (School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China)

  • Sinan Li

    (School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China)

  • Hong Wang

    (School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China)

Abstract

The diode-rectifier unit (DRU)-based high-voltage direct current (HVDC) transmission system offers an economical solution for offshore wind power transmission. However, this approach requires offshore wind farms to establish a strong grid voltage. To meet this requirement while fulfilling the dynamic characteristics of the DRU, this paper proposes an advanced grid-forming (GFM) control strategy for offshore wind turbines connected to DRU-HVDC. The strategy incorporates a P-U controller and a Q- ω controller based on reactive power synchronization. Furthermore, a novel virtual power-based pre-synchronization method and an adaptive virtual impedance technique are integrated into the proposed GFM control to improve system performance during wind turbine (WT) integration and low-voltage ride-through (LVRT) scenarios. The virtual power-based pre-synchronization method reduces voltage spikes during the integration of new wind turbines, while the adaptive virtual impedance technique effectively suppresses fault currents during low-voltage faults, enabling faster recovery. Simulation results validate the effectiveness of the proposed GFM control strategy, demonstrating improved start-up and LVRT performance through the pre-synchronization and adaptive virtual impedance methods.

Suggested Citation

  • Yiting Zhang & Wenjiang Zhu & Cheng Tang & Ni Liu & Sinan Li & Hong Wang, 2024. "Start-Up and Fault-Ride-Through Strategy for Offshore Wind Power via DRU-HVDC Transmission System," Energies, MDPI, vol. 17(19), pages 1-19, October.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:19:p:4968-:d:1492244
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