The Design Of DFIG Wind Power Variable Frequency Speed Regulation System Based On The ARM

Energy problem has now become the influence and the people's livelihood big problem, with conventional energy gradually exhausted, the development of renewable energy and new energy growing calls.Wind power generation as the development of new energy technology in the world the most mature, most scale development and commercialization prospects for development way of generating, already more and more get one of world's attention to the received extensive development and application. Wind power generation system of converter is whole WTG core, it is to volume miniaturization, quality the direction of development, and now converter position most are installed in doubly-fed machine rotor excitation loop of the circuit to overall capacity, so got decreases, and turn bad power has become the main control object, can make the mechanical energy to power conversion more safe and reliable, high efficiency and lower cost. These are variable speed constant frequency wind power systems of outstanding characteristics, this paper is the study of the double-fed WTG in variable speed constant frequency system of control technology.Doubly-feed machine dynamic coordinates model is theoretically this paper point, and by coordinate transform method, in complex vector coordinates of participation system control electric flow, voltage quantity, rotational speed value, analyzed the measured power value is deduced, two phase rotation coordinate system of inferior power changing mathematical model of doubly-feed machine, cited the stator crucial flux control strategy in doubly-fed machine grid under the condition of the advantages and feasibility. By adjusting the double PWM converter drive signal, directly change rotor current frequency and phase excitation, not only can adjust the rotor speed, the electromagnetic to meet the power output of speed requirements, still can maintain the stator side of constant frequency output.Based on variable speed constant frequency PWM converter principle of double system, we completed a magnetic field of stator vector control system design, and put forward by the ARM as core control system structure, system hardware circuit structure design, and expounds the system key components, and the selection principle of control system software design, draw out the main part of the control program flowchart. Finally, using Simulink and SimPowerSystems constructed in the double-fed motor control system simulation diagram, the system makes a comprehensive simulation experiment, model inverter of voltage, current waveform is good, simultaneously the low voltage across the simulation experiment, and the simulation results verify the validity of the theoretical analysis.