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Energies 2018, 11(12), 3369; https://doi.org/10.3390/en11123369

Power-Split Hydrostatic Transmissions for Wind Energy Systems

Department of Mechanics Mathematics and Management (DMMM), Polytechnic University of Bari, Viale Japigia 182, 70126 Bari, Italy
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Received: 22 October 2018 / Revised: 22 November 2018 / Accepted: 28 November 2018 / Published: 1 December 2018
(This article belongs to the Section Sustainable Energy)
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Abstract

In a wind turbine, if a continuously variable transmission is placed between the turbine rotor and the generator, the speed ratio can be tuned to match the variable rotor speed to the constant speed of the electric generator, thus eliminating the need to adapt the frequency to the grid. In this paper, power-split hydrostatic transmission (PS-HTS) architecture is proposed as a suitable continuously variable transmission for application to wind turbine systems. The performance of PS-HTS is modelled and compared with that of previously proposed architectures in which the hydrostatic transmission is placed in-line with traditional drives (in-line HTS). It is shown here that the PS-HTS can improve the annual energy production of a 250 kW rated power wind turbine of about 10–11% by employing a hydrostatic transmission with one-seventh the size of the one requested by in-line HTS architecture. View Full-Text
Keywords: wind turbine; hydrostatic transmission; CVT; power flow; power split wind turbine; hydrostatic transmission; CVT; power flow; power split
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Bottiglione, F.; Mantriota, G.; Valle, M. Power-Split Hydrostatic Transmissions for Wind Energy Systems. Energies 2018, 11, 3369.

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