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Structural integrity of a direct-drive generator for a floating wind turbine

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  • Sethuraman, Latha
  • Venugopal, Vengatesan
  • Zavvos, Aristeidis
  • Mueller, Markus

Abstract

In this work, the suitability of a direct-drive radial flux permanent magnet generator is examined as a probable drive-train candidate for a stepped-spar floating wind turbine system that supports a 2 MW downwind turbine. The suitability of the generator is assessed based on the structural integrity of its design (i.e., the stability of the air-gap between the rotor and stator) in response to the nacelle motions and its possible design implications on the overall system. Air gap deflections due to structural deflection and bearing tolerances were examined independently. The nacelle motions are obtained from experimental and numerical investigations on a 1:100 scale model. ANSYS suite is used to estimate the structural deformations of the generator and the changes in the air-gap distribution. Also, a simplified analytical model is used to compute the resulting changes in flux density and force distribution along the rotor periphery. The analytical model is also validated by 2D magneto-static simulations by utilising Finite Element Methods Magnetics software (FEMM).

Suggested Citation

  • Sethuraman, Latha & Venugopal, Vengatesan & Zavvos, Aristeidis & Mueller, Markus, 2014. "Structural integrity of a direct-drive generator for a floating wind turbine," Renewable Energy, Elsevier, vol. 63(C), pages 597-616.
    • Handle: RePEc:eee:renene:v:63:y:2014:i:c:p:597-616
    DOI: 10.1016/j.renene.2013.10.024
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    References listed on IDEAS

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    1. Sethuraman, Latha & Venugopal, Vengatesan, 2013. "Hydrodynamic response of a stepped-spar floating wind turbine: Numerical modelling and tank testing," Renewable Energy, Elsevier, vol. 52(C), pages 160-174.
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    Cited by:

    1. A Albani & MZ Ibrahim & KH Yong & ZM Yusop & MA Jusoh & AR Ridzuan, 2021. "The wind energy potential in Kudat Malaysia by considering the levelized cost of energy for combined wind turbine capacities," Energy & Environment, , vol. 32(7), pages 1149-1169, November.
    2. Li, Yan & Dong, Yuxing & Zhang, Qiang & Cao, Lihua, 2014. "Design, analysis and implementation of a constant-voltage power generation system based on a novel memory machine," Energy, Elsevier, vol. 76(C), pages 875-883.
    3. K. Padmanathan & N. Kamalakannan & P. Sanjeevikumar & F. Blaabjerg & J. B. Holm-Nielsen & G. Uma & R. Arul & R. Rajesh & A. Srinivasan & J. Baskaran, 2019. "Conceptual Framework of Antecedents to Trends on Permanent Magnet Synchronous Generators for Wind Energy Conversion Systems," Energies, MDPI, vol. 12(13), pages 1-39, July.
    4. W. Dheelibun Remigius & Anand Natarajan, 2022. "A review of wind turbine drivetrain loads and load effects for fixed and floating wind turbines," Wiley Interdisciplinary Reviews: Energy and Environment, Wiley Blackwell, vol. 11(1), January.

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