Research On The Maximum Efficiency Control Strategy Of Wind Power Generation System With Direct Driven And Permanent Magnet

The dissertation aimed to the uncertain of capture winds in wind power generation system. Research how to changing the maximize wind. It contains two aspects: The kinetic energy of wind into mechanical energy and The final mechanical energy into electrical energy, then control the speed of wind turbine speed into maximum power by appropriate control strategy.The wind turbine imitated by direct-current(DC) motor connect permanent magnet generator directly, after Uncontrollable Rectifier and Chopper, then converter to AC into the grid. The main content is how to control the wind effectively aiming to improving the effectiveness.The maximal wind energy capture is based on Maximum Power Point Tracking method, it includes Best tip speed ratio method, Power signal feedback method and Mountaineering search method. Mountaineering depends its easy algorithm implementation process(no need to measure wind speed and mechanical characteristics wind turbine) dominant in terms of maximum wind energy capture. The article proposes a mountaineering optimization algorithm,variable step algorithm mountaineering radically increased storage capabilities,can greatly reduce the computational cycle, and speed up response time. And the establishment of one for each motor speed output power meter, can avoid the same calculation, and then set the feedback control link to achieve maximum power tracking purposes.Finally, using Matlab/Simulink simulation model is constructed permanent magnet wind power generation system, It describes the adjustable parameters,given the current use of best climber algorithm maximum power tracking system post-simulation than traditional climbing algorithm, Verify that the new textmountaineering algorithm stability and the response rate is much better than traditional algorithms mountaineering, and is suitable for maximum wind energy capture variable speed constant frequency(VSCF) under.