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A novel hybrid transmission for variable speed wind turbines

Author

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  • Jelaska, Damir
  • Podrug, Srdjan
  • Perkušić, Milan

Abstract

We herein advance a novel, power summation hybrid transmission, which has the ability to convert the variable speed of a wind turbine rotor shaft into the constant speed required at a generator shaft for a whole range of wind speeds, thereby eliminating the need for a frequency converter. The transmission consists of a single one-stage planetary gear train (PGT) with three rotating shafts and a simple control system consisting of a few sensors and a control motor controlled by a microprocessor. One of the PGT shafts is the input, another is the output, and the third is coupled to the control motor as second input. The optimal tip-speed ratio is kept constant at low wind speeds by controlling the speed of the control motor, maximising the capture of energy from the wind. The wind-rotor speed continues to vary above the rated wind speed zone, but the rotor shaft power is kept constant by using the same control system. In this way, a constant electrical power output is achieved without altering the blade pitch, i.e., with the rotor in a fixed geometry. A frame design procedure for the transmission is proposed, efficiency expressions are derived, an example transmission operation is presented and efficiency comparisons to a mainstream variable speed wind turbine are carried out.

Suggested Citation

  • Jelaska, Damir & Podrug, Srdjan & Perkušić, Milan, 2015. "A novel hybrid transmission for variable speed wind turbines," Renewable Energy, Elsevier, vol. 83(C), pages 78-84.
  • Handle: RePEc:eee:renene:v:83:y:2015:i:c:p:78-84
    DOI: 10.1016/j.renene.2015.04.021
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    References listed on IDEAS

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    1. Mangialardi, L. & Mantriota, G., 1996. "Dynamic behaviour of wind power systems equipped with automatically regulated continuously variable transmission," Renewable Energy, Elsevier, vol. 7(2), pages 185-203.
    2. Zhao, Xueyong & Maißer, Peter, 2003. "A novel power splitting drive train for variable speed wind power generators," Renewable Energy, Elsevier, vol. 28(13), pages 2001-2011.
    3. Boukhezzar, B. & Lupu, L. & Siguerdidjane, H. & Hand, M., 2007. "Multivariable control strategy for variable speed, variable pitch wind turbines," Renewable Energy, Elsevier, vol. 32(8), pages 1273-1287.
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    Cited by:

    1. Radu Saulescu & Mircea Neagoe & Codruta Jaliu & Olimpiu Munteanu, 2021. "A Comparative Performance Analysis of Counter-Rotating Dual-Rotor Wind Turbines with Speed-Adding Increasers," Energies, MDPI, vol. 14(9), pages 1-21, May.
    2. Radu Saulescu & Mircea Neagoe & Codruta Jaliu, 2018. "Conceptual Synthesis of Speed Increasers for Wind Turbine Conversion Systems," Energies, MDPI, vol. 11(9), pages 1-33, August.
    3. Mircea Neagoe & Radu Saulescu & Codruta Jaliu, 2019. "Design and Simulation of a 1 DOF Planetary Speed Increaser for Counter-Rotating Wind Turbines with Counter-Rotating Electric Generators," Energies, MDPI, vol. 12(9), pages 1-19, May.
    4. Francesco Bottiglione & Giacomo Mantriota & Marco Valle, 2018. "Power-Split Hydrostatic Transmissions for Wind Energy Systems," Energies, MDPI, vol. 11(12), pages 1-15, December.
    5. Mircea Neagoe & Radu Saulescu & Codruta Jaliu & Petru A. Simionescu, 2020. "A Generalized Approach to the Steady-State Efficiency Analysis of Torque-Adding Transmissions Used in Renewable Energy Systems," Energies, MDPI, vol. 13(17), pages 1-18, September.

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