Analysis And Design Of DC-DC Converter Based On GaN Device

In order to solve the limitation of the field experimental conditions of the wind turbine system,it is necessary to build a wind turbine simulation system in the laboratory environment,which can develop different control algorithms,optimize the wind turbine model,and flexibly change the experimental parameters,which has practical value for the study of the wind turbine system And practical significance..This paper builds a wind turbine simulation system under laboratory conditions and studies the torque and speed characteristics of the wind turbine simulation system under different control strategies.Firstly,the aerodynamic characteristics of the wind turbine are described,and then the structure of the wind turbine system and the simulation system are introduced,and then the wind turbine system is reduced by the similarity theory,and the reduction ratios of various parameters are derived.Secondly,study the wind turbine simulation system based on the acceleration feedback control strategy,analyze its stability,analyze the problems in the control strategy,and then analyze the stability of the wind turbine simulation system in conjunction with the traditional optimization method(acceleration feedback loop filtering)to study its advantages and disadvantages.On this basis,a wind turbine simulation system with improved acceleration feedback control is proposed,and compared with the traditional method,comparing the recurrence of the two methods for the dynamic characteristics of the actual wind turbine system,and simulated in MATLAB / Simulink to verify the simulation Consistency of results and theoretical analysis.Thirdly,based on the acceleration feedback control strategy,a high-precision wind turbine simulation system control strategy is proposed to simplify the wind turbine simulation system model,eliminate the unstable factors introduced by the acceleration term,analyze the stability of the control strategy,and derive the stability conditions,and simulate in MATLAB / Simulink to verify the consistency of simulation results and theoretical analysis.Finally,by building a semi-physical simulation platform of the wind turbine simulation system,designing the hardware circuit part and the software simulation part,the wind turbine simulation system with the improved acceleration feedback control strategy and the wind turbine simulation system with high-precision control strategy are experimentally verified.The dynamic characteristics of the simulated system under the two control strategies are analyzed,and the experimental results prove the reliability and correctness of the theoretical analysis.