DEVELOPING, OPTIMIZING AND CONTROLLING OF 2MW HORIZONTAL AXIS WIND TURBINE
Creators: name: GIZACHEW DEREJE TSEGA
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019
Subjects: Renewable energy, Horizontal-Axis Wind Turbine, Wind Turbine Blades, Aerodynamics, GOE 239 (MVA H.31) air-foil, BEM.

description: Wind energy is the quickest developing sustainable power sources on the planet. Its development is increase exponentially. Ethiopia has inexhaustible sustainable power source assets and can possibly produce more than 60,000 megawatts electric power from hydroelectric, wind, solar and geothermal sources. Design, optimization and control are done on modeling and simulation tools which are termed as design and modeling software’s and techniques. In the research emphasis has been given to buckling analysis of wind turbine blade and tower, fatigue life evaluation of wind turbine blade and tower, dynamic analysis of wind turbine blade and tower vibration analysis, turbine components weight analysis is solved and compared with an existing turbine. In this research analysis starts from selecting standard airfoil, optimizing the airfoil to design point of view by using Qblade and then importing the optimize airfoil to SOLIDWORKS® 2019 and ANSYS® 19.2 to develop a 3D modeling and analyzing each structural analysis. Performance and parameter design optimization are done in blade calculator and MATLAB® 2018b software. The software’s simulation result revealed that the optimized blade profile design and the system controller increases the power production and limits the loads on the structural parts to prevent from failure and distraction of the system. The controller constantly optimizes the energy production based upon a continuous measurement of mainly wind direction and speed. The controller actively controls the yaw system, the blade pitch system and the generator. By using blade element theory, the optimized power coefficient is 0.47 or the efficiency of the turbine is 47% Generally, an attempt is made for Developing, Optimizing and Controlling Of 2MW Horizontal Axis Wind Turbine and by combining three 2MW wind turbines the effect of controlling system is simulated as 6MW wind turbines as a wind farm by using MATLAB® 2018b simu-link software. Observable limitations in this research is the complexity of the system and dis-assembling of the existing turbines is limited the overall outputs of the design. Also, thermal effect, natural disaster, manufacturing defect is not considered. The optimization program code output indicates that when rotor radius increase, the angle of attack should be decrease. When the angle of attack decreases the axial induction, factor is increased and angle of attack decrease when the lift coefficient increases but drag coefficient vi is decrease. The output value shows when rotor radius increased both axial induction factor and lift coefficient increased but angle of attack and drag coefficient are decreased. Finally, a sample is manufactured for a 300W small scale wind turbine; the blade for this turbine is made of a wood by keeping the selected airfoil shape. Even if there are major gaps according to pitch and yaw control system between the large- and small-scale turbines the sample the power is tasted.