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Structural integrity monitoring of onshore wind turbine concrete foundations

Author

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  • Currie, Magnus
  • Saafi, Mohamed
  • Tachtatzis, Christos
  • Quail, Francis

Abstract

Signs of damage around the bottom flange of the embedded ring were identified in a large number of existing onshore concrete foundations. As a result, the embedded ring experienced excessive vertical displacement. A wireless structural integrity monitoring (SIM) technique was developed and installed in the field to monitor the stability of these turbines by measuring the displacement patterns and subsequently alerting any significant movements of the embedded ring. This was achieved by using wireless displacement sensors located in the bottom of the turbine. A wind turbine was used as a test bed to evaluate the performance of the SIM system under field operating conditions. The results obtained from the sensors and supervisory control and data acquisition (SCADA) showed that the embedded ring exhibited significant vertical movement especially during periods of turbulent wind speed and during shut down and start up events. The measured displacement was variable around the circumference of the foundation as a result of the wind direction and the rotor uplift forces. The excessive vertical movement was observed in the side where the rotor is rotating upwards. The field test demonstrated that the SIM technique offers great potential for improving the reliability and safety of wind turbine foundations.

Suggested Citation

  • Currie, Magnus & Saafi, Mohamed & Tachtatzis, Christos & Quail, Francis, 2015. "Structural integrity monitoring of onshore wind turbine concrete foundations," Renewable Energy, Elsevier, vol. 83(C), pages 1131-1138.
    • Handle: RePEc:eee:renene:v:83:y:2015:i:c:p:1131-1138
    DOI: 10.1016/j.renene.2015.05.006
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    References listed on IDEAS

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    1. Schubel, P.J. & Crossley, R.J. & Boateng, E.K.G. & Hutchinson, J.R., 2013. "Review of structural health and cure monitoring techniques for large wind turbine blades," Renewable Energy, Elsevier, vol. 51(C), pages 113-123.
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    1. Rubert, T. & Zorzi, G. & Fusiek, G. & Niewczas, P. & McMillan, D. & McAlorum, J. & Perry, M., 2019. "Wind turbine lifetime extension decision-making based on structural health monitoring," Renewable Energy, Elsevier, vol. 143(C), pages 611-621.
    2. João Pacheco & Francisco Pimenta & Sérgio Pereira & Álvaro Cunha & Filipe Magalhães, 2022. "Fatigue Assessment of Wind Turbine Towers: Review of Processing Strategies with Illustrative Case Study," Energies, MDPI, vol. 15(13), pages 1-25, June.
    3. Wang, Xuefei & Yang, Xu & Zeng, Xiangwu, 2017. "Seismic centrifuge modelling of suction bucket foundation for offshore wind turbine," Renewable Energy, Elsevier, vol. 114(PB), pages 1013-1022.
    4. Junling Chen & Yiqing Xu & Jinwei Li, 2020. "Numerical Investigation of the Strengthening Method by Circumferential Prestressing to Improve the Fatigue Life of Embedded-Ring Concrete Foundation for Onshore Wind Turbine Tower," Energies, MDPI, vol. 13(3), pages 1-17, January.
    5. Junling Chen & Jinwei Li & Qize Li & Youquan Feng, 2021. "Strengthening Mechanism of Studs for Embedded-Ring Foundation of Wind Turbine Tower," Energies, MDPI, vol. 14(3), pages 1-16, January.
    6. Guo, Yaohua & Zhang, Puyang & Ding, Hongyan & Le, Conghuan, 2021. "Design and verification of the loading system and boundary conditions for wind turbine foundation model experiment," Renewable Energy, Elsevier, vol. 172(C), pages 16-33.

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