Comparative Modelling and Simulation of Small Wind Turbine System Using MATLAB/Simulink Based on Various Power Coefficient Models in Kupang-Indonesia

With the rapid depletion of fossil fuels that cause environmental impact such as climate change while the need for energy, especially electricity, is increasing in demand, the use of renewable energy must be immediately executed. One of the types available in most parts of the world is wind energy. In Indonesia, this energy can be implemented in Kupang, Nusa Tenggara Timur due to its high potential in which in contrast, has faced electricity crisis and frequent blackouts. Thus, this research aims to models and compares small wind turbines based on existing power coefficient mathematical approaches which are polynomial, sinusoidal, and exponential using MATLAB/Simulink. The result of this study is based on the selected model, which is the Ovando et al. model with a coefficient of 0.4513. This model produced power in the range of 9000–16000 W under the assumption of periodic wind speeds of 50–60 km/h. The calculations were based on pre-determined parameters, including a blade radius of 2 m, a tip speed ratio (λ) of 7, a pitch angle (ß) of 0 degree, and an air density of 1.225 kg/m<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup>, The output may help in solving Kupang's electricity issues and reach 23% of renewable energy target by 2025.