COMPUTER SIMULATION AND TECHNO-ECONOMIC EVALUATION OF AUTONOMOUS CONTRA-ROTATING VARIOUS POWER WIND TURBINES WITH A TRANSFORMERS WITH ROTATING HALF

For efficient use of low-speed wind potential, low-power autonomous wind turbines with vertical axis of rotation are used. A new design of contra-rotating contactless vertical axis of rotation in which two wind rotors rotate in opposite directions is proposed. A computer imitative model of wind turbine, whose work was checked on a test turbulent wind flow was created and also a subsystem with an optimum control of the permanent magnet synchronous generator load, which takes into account the aerodynamic and electrotechnical processes in vertical axis of rotation were created. An economic comparison of a new contactless contra-rotating construction of wind turbine with a basic version of the traditional energy efficient vertical axis of rotation with one vertically oriented wind rotor, multipolar permanent magnet synchronous generator and a semiconductor active rectifier was held. On the basis of the made design calculations and of the obtained required weight of active materials, the value of the generators for traditional and contra-rotating design and transformer with rotating half were specified. A general feasibility study wind-driven is implemented.