Research And Implementation Of Simulation Training Device For Doubly Fed Wind Turbine

Electric energy is an indispensable and irreplaceable energy for the survival and development of modern human society.The development of society and the progress of the country are inseparable from high-quality power supply.As a new type of energy,wind power has two important characteristics:renewable and low pollution,so it has broad application prospects in the future.In recent 20 years,with the continuous progress of control theory and control engineering,the control strategy of doubly fed induction generator(DFIG)has also made great progress,and the number of wind farms using DFIG is also increasing.However,the skill quality and learning ability of employees in wind power and related industries are not the same,so the training device for employees in wind power and related industries is urgently needed.Therefore,the research and implementation of DFIG simulation training device becomes very meaningful.This paper takes the simulation training device of doubly fed wind turbine as the research object.Firstly,this paper introduces the control theory and simulation modeling of the wind turbine,carries on the mathematical modeling of the two parts of the wind turbine and the motor,and introduces the control strategy of the two parts in detail.Then,this paper introduces the core control device of doubly fed wind turbine,dual PWM inverter,and carries on the modeling.Then,this paper proposes an improved PIR controller,which can successfully suppress the double frequency disturbance of power grid instead of the PI controller in the inner loop of frequency converter.After that,this paper also introduces the hardware structure,type selection and related communication design of the DFIG simulation training device,including three communication protocols(UDP,PROFIBUS,I/O)and the parameters and performance of related equipment.Finally,this paper describes the results of the device,including three operation modes of the program(offline operation mode,online operation mode,historical data reading mode),fault generation function and test interface.