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Increasing the Efficiency of Grid Tied Micro Wind Turbines in Low Wind Speed Regimes

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http://www.scirp.org/journal/PaperInformation.aspx?PaperID=50421#.VD4fp1fHRK0

Major problem with grid tied micro wind turbine is synchronization and wind variability. Due to this problem the stability of available grid gets reduced. The stability can be achieved by output power control of the turbine. Major part of many countries like India, the annual mean wind speed is not high. The rated wind speed of turbine remain around 11 m/s and cut in is around 3.5 m/s. Due to this problem we aimed to develop a sustainable wind energy system that can provide stable power supply even at the locations of low wind speed of 2 - 4 m/s. To address this issue, a momentary impulse or external torque to the rotor by external motor is one of the good options to maintain the momentum of blades and thus provide stability for sufficient time. Various theoretical calculations and experiments are conducted on the above method. This would increase the output power and also the efficiency of wind turbine. We show that Return-On-Investment will be high as compared with other grid connected turbines. Our proposed concept in the present study, if implemented properly, can help the installation of number of wind turbines even at domestic level. It also makes the consumers energy independent and promotes the use of wind as a source of energy and may enter as a rooftop energy supply system similar to solar.
Cite this paper
Tiwari, K. and Harinarayana, T. (2014) Increasing the Efficiency of Grid Tied Micro Wind Turbines in Low Wind Speed Regimes. Smart Grid and Renewable Energy, 5, 249-257. doi: 10.4236/sgre.2014.510023. 
 

[1] Christiner, M., Dobbins, R., Ndegwa, A. and Sivak, J. (2010) Rooftop Wind Turbine Feasibility in Boston, Massachusetts. Worcester Polytechnic Institute, Worcester.
[2] Jha, S.N. and Gandhi, J.R. (2006) Low RPM, High Torque Small Wind Generator for Hybrid System.
http://www.ibrarian.net/navon/paper/Low_RPM___High_Torque_Small_Wind_Generator_for_Hy.pdf?
paperid=7651162
[3] Indian Wind Energy and Economy. www.Indianwindpower.com
[4] Centre for Wind Energy Technology (C-WET), Chennai.
http://www.cwet.tn.nic.in
[5] Burton, T., et al. (2001) Wind Energy Handbook. John Wiley & Sons, Ltd., Hoboken.
[6] Ahmed, S. (2010) Wind Energy: Theory and Practice, Department of Mechanical Engineering, MNNIT Bhopal, Prentice Hall of India, New Delhi.
[7] Johnson, G.L. (2001) Wind Energy Systems. Kansas State University
[8] Ragheb, M. (2014) Optimal Rotor Tip Speed Ratio.
http://mragheb.com/NPRE%20475%20Wind%20Power%20Systems/Optimal%20
Rotor%20Tip%20Speed%20Ratio.pdf
[9] McCosker, J. (2012) Design and Optimization of a Small Wind Turbine. Rensselaer Polytechnic Institute, Troy, NY.
[10] Ragheb, M. and Ragheb, A.M. (2011) Wind Turbines Theory—The Betz Equation and Optimal Rotor Tip Speed Ratio. Fundamental and Advanced Topics in Wind Power, Dr. Rupp Carriveau (Ed.), InTech.
http://www.intechopen.com/books/fundamental-and-advanced-topicsin-wind-power/
wind-turbines-theory-the-betz-equation-and-optimal-rotor-tip-speed-ratio
[11] Predescu, M., Bejinariu, A., Mitroi, O. and Nedelcu, A. (2009) Influence of the Number of Blades on the Mechanical Power Curve of Wind. International Conference on Renewable Energies and Power Quality (ICREPQ’09), Valencia, 15-17 April 2009, 6p.
[12] Sarkar, A. and Behera, D.K. (2012) Wind Turbine Blade Efficiency and Power Calculation with Electrical Analogy. International Journal of Scientific and Research Publications, 2, 1-5.
[13] Martinez, J. (2007) Modelling and Control of Wind Turbines. https://workspace.imperial.ac.uk/centreforprocesssystemsengineering/Public/MSc%20Thesis/2007%20
MSc%20Thesis/2007.2%20-%20Martinez%20Jasmin.pdf
[14] Rivkin, D.A. and Silk, L. (2013) Wind Energy (Art and Science of Wind Power). Jones & Bartlett Learning, Burlington, Mass.      eww141015lx
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