Operation Control And Simulation Of Variable-speed Constant-frequency Wind Power Generation System

Nowadays,the lack of general energy source,electric power and the worsening of power supply circumstance problems increasingly, people pay more and more attention to wind energy.AC excitation doubly fed wind energy generation system has equipped transducer which only deals with slip power in double direction in rotor loop,it not only possesses the characteristics of small cubage but also realizes flexible connection of mechanical-electric system.The thesis discusses wind energy generation system's main control orderly procedures first,than after studying the mathematical model in rotary two-phase coordinate, based on the stator flux-oriented excitation vector control strategy, the AC-excited rotor control strategies which used internal model controller for cutting-in and by combining power control and speed control,a hybrid control method for Maximum Power Point Tracking(MPPT) are proposed bothly.The MATLAB simulation results for cutting-in,MPPT,constant power control can achieve good performance.