Scholarlink

<p>Offshore wind farms located far from the shore currently use AC-based collection systems with bulky line frequency transformers. Due to limited space, this approach is challenging and expensive. As an alternative, medium-voltage DC (MVDC) collector systems have been proposed as a cost-effective solution for integrating offshore wind farms. One crucial area of research for these systems is DC-link voltage regulation to ensure safe, reliable, and stable operation of the entire system. In this study, an adaptive voltage regulator is designed to stabilize the DC-link voltage at its nominal value against disturbances. Additionally, current observers are suggested to eliminate the need for current sensors, increasing reliability and reducing implementation costs. To validate the control method and test the observer’s performance, simulations and hardware-in-the-loop tests (HIL) were conducted on a 10-MW wind turbine.</p>

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Dc-link voltage regulation in all-DC offshore wind farms

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月9日

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  • Amir Hossein Mahdizadeh,
  • Mehdi Tavan,
  • Mohsen Soltani,
  • Frede Blaabjerg,
  • Amin Hajizadeh,
  • Pietro Tricoli

摘要

Offshore wind farms located far from the shore currently use AC-based collection systems with bulky line frequency transformers. Due to limited space, this approach is challenging and expensive. As an alternative, medium-voltage DC (MVDC) collector systems have been proposed as a cost-effective solution for integrating offshore wind farms. One crucial area of research for these systems is DC-link voltage regulation to ensure safe, reliable, and stable operation of the entire system. In this study, an adaptive voltage regulator is designed to stabilize the DC-link voltage at its nominal value against disturbances. Additionally, current observers are suggested to eliminate the need for current sensors, increasing reliability and reducing implementation costs. To validate the control method and test the observer’s performance, simulations and hardware-in-the-loop tests (HIL) were conducted on a 10-MW wind turbine.