Research On Control Method Of Energy Storage Based On Stand-alone Pv Generation

Nowadyas,with the increasing burden on energy exhaustion and environment pollution,as a cleanly and renewable energy,solar energy has became a hotspot of the whole world.At the same time,the technique of the PV(Photovoltaic) conversion has come into the applied level on a large scale.In the future,the application of the PV will has a exciting status.It is significant to research on improving the conversion efficiency of PV from its Volt-Ampere Characteristics.The output characteristics of PV arrays is the base of research on PV systems. This thesis presents simulation model of PV arrays based on the output characteristics formulas.It can be directly applied in circuit simulation and system analysis.Maximum Power Point Tracking(MPPT) method is an important means to improve the system efficiency of PV power generation system.Firstly,MPPT theory and various MPPT methods are introduced in the literature.Secondly,this article analyzes the principle of BUCK circuit applications.The simulation study of BUCK circuit applied in the MPPT is completed based on Matlab/Simulink simulation model.Finally,based on analyzing the working states of stand-alone PV generating systems, the design of the solar charging and discharging controller based on microcontroller has conducted.