Research On Hybrid Driven Wind Turbine Simulation Test Platform Based On Asynchronous Motor

Hybrid driven wind turbine is an important research direction in the field of wind turbine.However,it is difficult to carry out field test due to the constraints of climate,environment and other factors.In order to study the hybrid driven wind turbine more conveniently,it is of great theoretical and practical significance to build a simulation test platform for hybrid drive wind turbine in the laboratory to solve the problem of variable speed and constant frequency in this type of wind turbine.This paper mainly completes the following work:The paper analyzes the combined wind speed model and wind turbine model.The parameters of the differential speed ratio and power ratio of each end of the hybrid drive wind turbine are introduced into the hybrid drive wind turbine system,and the reference wind speed and the reference speed are obtained.The state change of power flow in the whole wind speed is analyzed;The model of differential gearbox is established,and the ratio of speed and torque between three ends is determined.According to the best tip speed ratio method,a new scheme of simulation of maximum power point of hybrid driven wind turbine is proposed.In order to effectively control the induction motor in the hybrid drive simulation test platform,the mathematical model of three-phase induction motor in ABC coordinate system is derived.On this basis,combined with Clark and park coordinate transformation,the mathematical model of three-phase induction motor in two-phase static and two-phase rotating coordinate system is obtained.The vector control algorithm of induction motor is analyzed,and the realization steps of SVPWM algorithm are deduced.On the basis of the above,the rotor field oriented(FOC)vector control system of three-phase asynchronous motor is built.Combined with the principle of hybrid driven wind turbine,the simulation platform of hybrid driven wind turbine is built to verify the correctness of the theory.The hardware circuit and software control system of the hybrid driven wind turbine simulation platform are designed,and the hybrid power simulation test platform is built.Based on this platform,the relationship between the magnetic powder brake and the loading current and the speed regulation performance of the asynchronous motor driver at the simulation end are analyzed.The comparative analysis of simulation and test data shows that the simulation test platform established in this paper can effectively simulate the hybrid driven wind turbine.