Control of water pumping driven by wind turbine based on Quasi Z source inverter

摘要

Water pumping system with wind turbine can not only effectively use wind energy, but also solve the problem of water supply and irrigation in the remote areas. In order to improve efficiency as well as reliability of wind turbine and adjust the speed of motor smoothly and quickly under the condition of wind speed changes, a variable frequency vector control method for three-phase asynchronous motor based on quasi Z source inverter to drive water pumping is proposed in this paper. The quasi Z source network can boost DC link voltage and adjust motor speed according to the various output power of the wind turbine. A simulation studies is carried out under MATLAB, and the results show that the combination of variable frequency vector control with quasi Z source inverter can make the motor achieve smooth speed. Therefore, the proposed control method can improve the operating efficiency and reliability of water pumping driven by wind turbine under the fluctuation of wind speed.