Miniature DC-DC Converter Architecture Based On Photovoltaic Research

The building integrated photovoltaic (BIPV) is more and more applied in the field ofenergy-saving building. The way of series-parallel connection for the photovoltaic modules isadapted by conventional photovoltaic system.Because of its poor thermal spots and shadowsability are insufficiency,the modular structure was proposed by related study, this structure caneffectively overcome the above shortcomings, but the downside is grid control complex.Toovercome the complex a dc modular structure was proposed in this paper. Each photovoltaicmodules will be equipped with a dc micro converter with MPPT function, it can be effective toavoid the influence for power generation efficiency because of some obscured photovoltaicmodules.The research was carried out mainly from the following several aspects:(1) The concept, structure of building integrated photovoltaic and working principle andapplication of every controller were studied. The national and industry standards of photovoltaiccontroller and building integrated photovoltaic were consulted.(2) The actual type of photovoltaic power for building was developed a set of designingprocess based on the operation and maintenance specification of building integratedphotovoltaic.(3) The topology for the controllers were selected and designed on the basis of GB, and thecircuit principle diagram and PCB diagram for the micro photovoltaic converter and chargingand discharging controller for battery were mapped by the drawing software of Altium Designer.(4) The preparation of the formulation of coordinated control method and software. In viewof the coordination problems between the various modules in the system, the switching controlstrategy was proposed and the control method and corresponding programs for each controllerwere completed.(5) Finally, the experimental platform system of400W was established, while it can be usedto verify the performance of each controller, coordination control method and the feasibility ofthe system topology. Finally, compared with traditional photovoltaic building power system.