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Suppression of Wind Generator Speed Vibration Based on the Internal Model Control with Three Degrees of Freedom

Author

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  • Chenyang Zhou

    (School of Things Internet Engineering, Jiangnan University, Wuxi 214122, China)

  • Yanxia Shen

    (School of Things Internet Engineering, Jiangnan University, Wuxi 214122, China)

Abstract

When the wind power system is working in the maximum wind energy tracking area, or when its mechanical drivetrain system vibrates and the vibration frequency is relatively high, the system cannot suppress the speed vibration of the generator in the drivetrain system by adjusting the pitch angle. In this paper, a generator speed control system based on the three degrees of freedom internal model control (3-DOF-IMC) is established to control the generator speed. Thus, a scheme of using the feedback filter in the 3-DOF-IMC to suppress generator speed vibration caused by drivetrain shaft elasticity and gear clearance in the drivetrain system is proposed. Firstly, the vibration problem and waveform of the two-mass wind power drivetrain systems are discussed, and the generator’s vector control and speed control systems are analyzed. Secondly, the principle of the 3-DOF-IMC is described, and the influence of the three controllers on the speed tracking performance and anti-interference performance of the generator is discussed. The suppression ability of the feedback filter for different forms of disturbance signals is emphasized. Finally, the feedback filter controls the generator speed and eliminates the influence of drivetrain vibration on the generator speed. To verify the superiority of the proposed method, the vibration suppression effect, tracking performance and anti-interference performance of the proposed method are compared with the engineering design method (EDM) and conventional IMC (1-DOF-IMC) method. When the parameter α / β = 0.66, the generator speed amplitude overshoot of the proposed method is the same as the EDM. When α / β = 1, it is only 4% of the amplitude overshoot of the EDM. In addition, the tracking performance and anti-interference performance of the proposed method can be adjusted independently, and it is better than the EDM and the 1-DOF-IMC method.

Suggested Citation

  • Chenyang Zhou & Yanxia Shen, 2022. "Suppression of Wind Generator Speed Vibration Based on the Internal Model Control with Three Degrees of Freedom," Energies, MDPI, vol. 15(19), pages 1-26, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:19:p:7445-:d:938206
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    References listed on IDEAS

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    1. Mingming Zhao & Jinchen Ji, 2016. "Dynamic Analysis of Wind Turbine Gearbox Components," Energies, MDPI, vol. 9(2), pages 1-18, February.
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