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Continuously Variable Transmission (CVT) Optimal Regulation Curves in a Small Wind Energy Conversion (WEC) System
Milan Radic, Milica Rasic and Zoran Stajic
Faculty of Electronic Engineering University of Niš, Aleksandra Medvedeva 14 18000 Niš, Serbia
Abstract: In the current work, we have given a simple parameter-based analytical approach for calculation of continuously variable transmission (CVT) optimal regulation curves in a small wind energy conversion (WEC) system. A CVT is placed between turbine’s rotor and an induction generator directly connected to the power system, enabling better utilization of available wind power. We have developed methods to calculate the optimal CVT regulation curve in details and has been applied to the small WEC with rated power of 55 kW. Effects of generator’s winding resistance variation, caused by temperature change, have been studied further. During the testing we found that there is no impact of the calculated curves on the normally expected changes of the winding’s resistances.
Keywords: Wind turbine, Induction Generator, Winding Temperature, CVT, Optimal Regulation Continuously Variable Transmission (CVT) Optimal Regulation Curves in a Small Wind Energy Conversion (WEC) System
DOI:https://doi.org/10.6025/stj/2022/11/1/15-21
Full_Text   PDF 1.67 MB   Download:   147  times
References:

[1] Manwell, J., McGowan, J., Rogers, A. (2002). Wind Energy Explained: Theory, Design and Application, John Willey & Sons, New York, 83-139.
[2] Martens, A., Albers, P. (2003). Wind Turbine Study: Investigation into CVT application in wind turbines, Technische Universiteit Eindhoven, Eindhoven, October, 3-27.
[3] Cotrell, J. (2005). Assessing the potential of a mechanical continuously variable transmission for wind turbines, Conference paper NREL/CP-500-38212, National Renewable Energy Laboratory, August.
[4] Miltenovic, V., Velimirovic, M., Banic, M., Miltenovic, A. (2011). Design of windturbines drive train based on CVT, Balkan Journal of Mechanical Transmissions, 1 (1) 46-56.
[5] Radic, M., Stajic, Z., Spasic, M., Dankovic, N. (2012). Introducing the concept of controlled self-excitation and synchronization of a cage-rotor induction generator driven by CVT-based wind turbine, SAUM 2012, Conference Proceedings, 189-192, Nis, Serbia.
[6] Radic, M., Stajic, Z., Floranovic, N. (2014). Effects of grid voltage variations on wind turbine’s optimal CVT ratio, SAUM 2014, Conference Proceedings, 221-224, Nis, Serbia.


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