Criteria and Instruments for Choosing a Wind Turbine.

Wind energy is becoming one of the most widely used renewable energy sources in Romania as well. In order for production to be efficient and implicitly profitable, wind turbines are usually arranged in wind farms. The main purpose of the paper is to present intelligent criteria and tools for designing wind turbines. In the present study, the following are pointed out as topics of interest: the shading of the wind given by an obstacle, the height of the turbine hub, the distance between the obstacle and the turbine, the roughness class of the turbine location, the height and width of the obstacle and the porosity of the obstacle. These elements help to determine the variation of the wind front, the power of the wind captured by the turbines and the calculation of the energy captured. The results obtained using calculation programs are: wind speeds are in the range of 5-10 m / s in the predominant direction S-SE (between 2700 -3300) and V-NV (between 1500 -2100); power density function; Weibull distribution for wind speed; turbine power curve; Wind turbulence in the turbine area; power coefficient depending on wind speed; The amount of energy that the wind transfers to the rotor; Wind frequency curve; speed insurance curve. Finally, by using the modelling tools in Math Lab Simulink, the random speed distributions were obtained, which can be analyzed and then provided to obtain a maximum power, and consequently a maximum amount of energy. [ABSTRACT FROM AUTHOR]