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Modeling of a Stand Alone Horizontal Axis Wind Turbine



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Modeling of a Stand Alone Horizontal Axis Wind Turbine Luke Dosiek1 and Pragasen Pillay2 Department of Electrical and Computer Engineering Abstract This paper addresses the design of a horizontal axis wind turbine simulation using MATLAB SIMULINK A novel approach to simulating the wind over a long period of time with a resolution of one Hertz is also discussed in this paper as the wind turbine simulator will take a simulated wind profile as the input and convert it to an output of electrical power The results of the work done thus far are compared to actual data to verify the validity of the Wind Generator WG proposed here Methodology In order to accurately reproduce wind speeds over a time scale longer than about 10 minutes while retaining an accurate resolution of about 1 second both the turbulence and the long term wind components need to be modeled Unfortunately there is no single model that can accurately cover both short term fluctuations and long term changes Nichita 2002 As stated by Nichita 2002 a method for modeling long term wind called the Van der Hoven model is accurate for long range simulation but provides an inaccurate representation of turbulence On the other hand Nichita 2002 states that modeling turbulence can be achieved using the Von Karmen power spectrum but it fails to provide accurate results once time horizons on the scale of tens of minutes are reached Another technique of modeling turbulence alone is the Shinozuka method Jeffries 1991 To get around the problem of modeling long term wind with a high resolution Nichita used a method where he combined both the Van der Hoven and Von Karmen models The Van der Hoven model is used to generate a new wind speed data point every 10 minutes or so This Van der Hoven point is then taken as the average wind speed over the 10 minute interval that is filled with Von Karmen generated wind data Since the Von Karmen psd has average velocity as a variable this moving average generated by the Van der Hoven



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