Research On Wind Turbine Water Pumping System Based On Quasi-Z-Source Inverter

With the development of economic and social rapidly,energy and environmental problems more and more serious,it is an effective method to resolve the contradiction between economic development and environmental by adjusting the energy structure and using clean energy.The people of remote areas living scattered and traffic is inconvenience,conventional power transmission has the problem,which has high costs and difficult technical,resulting in there is not a good solution to solve the power transmission problem.The wind turbine water pumping system can solve the water supply problem in the power shortage area.However,the current wind turbine water pumping system has a problem of insufficient boost voltage and low utilization ratio of DC link voltage.In this paper,the wind turbine water pumping system based on quasi-Z source inverter is the object of study.The main contents are described as follows:Firstly,the background and significance of wind turbine water pumping system are discussed,and the research status of wind turbine water pumping system at home and abroad is summarized.The structure of the wind turbine water pumping system is put forward,and the performance of each component of the system is analyzed.Secondly,the topology and boosting principle of quasi-Z-source inverter are analyzed.The parameters of quasi-Z-source inverter DC-side impedance network are calculated,and the control method of quasi-Z-source inverter is proposed.Thirdly,the design of the wind turbine water pumping system is carried out,and the water pump,the electric motor,the wind power generator,the quasi-Z source inverter and the reservoir of the wind turbine water pumping system are matched and selected,and the three-phase asynchronous Motor control method is designedFinally,the simulation model of wind turbine water pumping system is established in Matlab/Simulation environment,the simulation of DC side boost and AC side inverter control method for Z source inverter are established.The simulation results show that the speed of the motor can track the varying speed of wind,the boost control of the quasi-Z source inverter and the frequency conversion of the three-phase asynchronous motor are realized at the same time.Ensure the wind turbine water pumping system can operate stably and effectively.