Research On Optimal Operation And Simulation Of Permanent Magnet Direct-driven Wind Turbine

With the rapid economic development,the consumption of energy is increasing more and more,conventional energy sources are becoming depleted,the need for some clean,non-polluting,renewable new energy are urgent.In the current number of renewable energy and the development of new energy technologies,wind power has its own unique advantages,occupies a prominent position in the field of renewable green energy development,with the great value of utilization,has received wide attention around the world.Direct drive permanent magnet.synchronous wind power systems is a new type of wind power technology,its superior performance attracted the attention of the majority of wind power research scholars.Due to the use of the gearbox,the unit length of the horizontal axis is greatly reduced,the energy produced by the mechanical transmission chain is shortened to avoid loss,noise and material of the wear and tear,the working life of the unit more security,reduce maintenance costs,and more suited to the requirements of environmental protection.This thesis mainly in direct-drive permanent magnet synchronous wind power system as the research object,By controlling the converter circuit and advanced MPPT control strategy,and ultimately the best track in the rated wind speed.The whole system is based on Matlab/Simulink as a platform to build a simulation model,including a combination of wind model,the fan model and control system model.For fan control paper presented vector control and SDRE control two methods,the method of vector control is decoupled by id=0,using current and speed dual closed loop to control.SDRE control is an effective method for control of nonlinear systems,nonlinear problem is transformed into a state Rccati equation,thus simplifying the original system.The whole system by means of Matlab software simulation,a good simulation results show the effectiveness of the control platform,the optimal operation of the fan system.