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<p>Due to recent increases in renewable energy penetration levels and a decrease in electrical grid natural inertia, integrated wind turbines are required to achieve a secure frequency response. This study presents improved and secured inertial and droop control responses for variable-speed wind turbines (VSWTs) through coordinated rotor speed and pitch angle controls. In contrast to existence control methods, this approach guarantees rapid and reliable engagement across all wind speed ranges and eliminating the need for wind speed measurements. Firstly, a dynamic de-loading-based droop control was designed to directly regulate de-loading percent based on frequency deviation, removing the need for power reserve knowledge to implement secure synthesis droop control. Secondly, an improved inertial response is designed to be fast while considering the stored kinetic energy and allowable limitations. Further, two innovative supplementary control loops were implemented to improve coordination among the rotor speed, pitch, and inertial control loops during the frequency events. To validate the proposed control, a grid integrated with high-wind power integration of 40% was considered under a 10 % de-loading of the wind turbines. The efficacy and applicability of the proposed control framework were validated in different operating conditions and scenarios by simulations and hardware-in-the-loop (HIL) experiments.</p>

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Improved Coordination of Pitch and Rotor Speed in Variable-Speed Wind Turbines for Fast Frequency Response

  • 期刊论文

  • 发表日期：

    2025年6月3日

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  • Said I. Abouzeid,
  • Y. Chen,
  • Gaber Magdy,
  • Yexiang Yu,
  • Esam H. Abdelhameed

摘要

Due to recent increases in renewable energy penetration levels and a decrease in electrical grid natural inertia, integrated wind turbines are required to achieve a secure frequency response. This study presents improved and secured inertial and droop control responses for variable-speed wind turbines (VSWTs) through coordinated rotor speed and pitch angle controls. In contrast to existence control methods, this approach guarantees rapid and reliable engagement across all wind speed ranges and eliminating the need for wind speed measurements. Firstly, a dynamic de-loading-based droop control was designed to directly regulate de-loading percent based on frequency deviation, removing the need for power reserve knowledge to implement secure synthesis droop control. Secondly, an improved inertial response is designed to be fast while considering the stored kinetic energy and allowable limitations. Further, two innovative supplementary control loops were implemented to improve coordination among the rotor speed, pitch, and inertial control loops during the frequency events. To validate the proposed control, a grid integrated with high-wind power integration of 40% was considered under a 10 % de-loading of the wind turbines. The efficacy and applicability of the proposed control framework were validated in different operating conditions and scenarios by simulations and hardware-in-the-loop (HIL) experiments.