Design And Analysis On Wind Turbine System Based On Combined-Simulation Technology

Energy and environment have become critical issues for the survival and development of human beings nowadays. Since bearing the advantages of non-pollution, time-saving, flexible-investment, room-saving, wind power has good economical and social benefits. Otherwise, by contrasting to thermal power and hydraulic power, wind power is inferior in many fields, such as cost, electric energy quality, equipment manufacturing, and controlling techniques, etc. Therefore, to deeply study the design and analysis technologies of the wind turbine system is rather rewarding and important for sustainable developing wind energy and realizing wind turbine nationalization in theories and engineering application.To analyze and study the capabilities of the wind turbine system must be first so as to make sure that the wind turbine is able to run on normal condition during its designing life-span. The paper applies the combined-simulation techniques into the virtual prototype of a wind turbine. And it studies in such aspects as aero-dynamics, system combined-simulation analysis model, total performance analysis, and vibration characteristic simulation analysis. The main ideas are as follows:â‘ Research on aero-dynamics theory, adopting the classic the Blade Element Momentum Theory (BEM). According to the BEM, coordinates are built and a calculating method is proposed. Then figure out axial flow induction factor, forces and torques on the tower's top and blade's root, power coefficient, and thrust coefficient, which are proved in the application of the combined-simulation model afterwards.â‘¡Research on the combined-simulation analysis model of a wind turbine. First of all, finite element mode analysis for rotor and tower is done, the results of which is confirmed to be accurate compared to those of Bladed, a well-known software all over the world. Later on, the result model is imported into ADAMS, where cabinet is regarded as a rigid body, and restrictions and external loads are put on. Thereby, the whole multi-bodies dynamics model of a wind turbine is completed. Then input and output variables for ADAMS are defined to make a loop between ADAMS and controlling software. After that, the controlling part of combined-simulation system are built, including aero-dynamics calculation block, transmission system block, induction-generator block, and PID constant speed pitch-varying regulation controller block. After all, use ADAMS/Controls (controlling block) to connect the two parts, by which controlling part drives the multi-bodies dynamics model, and the latter sends feedbacks, such as displacement and velocity, to the former to realize interactive simulation on the controlling system environment.â‘¢Research on the performance analysis of the whole wind turbine system. Firstly, when wind speed varies from 5 to 25 meters per second, the performance parameters is calculated, including power, rotor rotational speed, aero-dynamics torque, generator torque, reverse torque, and power coefficient. Thus the rated wind speed, rated rotational speed, and main pitch running zone.â‘£Research on the vibration characteristic simulation analysis of a wind turbine. The vibration characteristic curves are obtained by using the previous combined-simulation model. And also the comparison is made with those of Bladed, which confirms that the curves are able to reflect the real vibration of a wind turbine, and check up aero-servo-elastic characteristic, so that instructs the design of the rotor. It is believed that combined-simulation on the basis of ADAMS and MATLAB/Simulink can do well in the research and design of a wind turbine.