The Research Of Maximum Power Point Tracking Control In Photovoltaic System

With the rapid development of the global economy and the people’s livingstandards mentioned, desperately short of fossil energy and environmental issues hasbecome a worldwide problem, solar energy is a new clean energy alternative to fossilfuels, and has a huge advantage, become national studies in recent decades hots pot. Asa pollution green power solar energy instead of the tradition fossil energy, with greatadvantages has become a current research focus of world. The reason that want toenhance the power efficiency of the PV system, because that the PV panels’lowefficiency, thus reflects the significance of the maximum power point tracking PVsystem. Maximum power point tracker of photovoltaic power generation system for thesubject.The background of this article to introduce the research topic for the start. Andsummarizes the current status and future trends of development at home and abroad andintroduced the composition and classification of the photovoltaic power generationsystem. Subsequently, According to the PV array module of the mathematical model,the paper reach the related features of the PV array module in theory, establishsimulation model which simulates photovoltaic array module and the outputcharacteristics of sunlight intensity under different solar cell output.Second, this thesis introduced the MPPT concept and principle, analysis severalcommon MPPT methods, and improved INC is adjust duty circuit of convertedefficiency.Than four common DC/DC converter works again, determine the Boost convertermain circuit of the system, and the design of the main parameters of the circuit, andalso designed the switch driver circuit and sampling circuit, built simulation model,and verify its feasibility.Finally, the mainly work of the software part is complying control program which isbased on TMS320F28335DSP using the on-chip resources of DSP, the software partincludes the main flow chart of the system, the program of the maximum powertracking algorithm and judgment subroutine flowchart.Then MPPT controller systemtest work to verify the feasibility of the system design.