Research Of Energy Conversion Configuration Topology And MPPT Technology For BIPV System

Building energy conservation and emissions reduction are concerned by people increasingly,"energy conservation and emission reduction" from buildings become the focus of attention.Because of its advantages of clean and renewable,solar photovoltaic power generation is to be closely attented by the world and developed rapidly,combine photovoltaic power generation system with building which has large numbers of front surface could reduc the cost of photovoltaic power generation systems facilities and the power loss by long-distance transmission of photovoltaic power generation system and so on. At the historical background of the pursuit of sustainable development,science and technology are developing rapidly, research of building integrated photovoltaic(BIPV) has profound implications.In order to improve the efficiency of solar battery, maximum power point tracking(MPPT) is researched on basis of the photovoltaic battery modeling and simulation of its characteristics. The simulation analysis the defects of the traditional perturbation and observation method and the fixed parameters method is optimized from starting time. Finally, this paper develop a new algorithm of three modes based on short step size perturbation and observation method and optimization fixed parameters method,which reduce the power oscillation at the time of speeding up the respond time of the system and achieve the desired results.The conventional energy conversion configurations of centralized and AC module are analysis. According to the shadow effect on the influence of BIPV generation system, this paper adopt a DC module energy conversion configuration; The DC converter uses cascade BOOST circuit,which complete the maximum power point tracking and control output voltage stability, the circuit configuration and control strategy are verified based on simulations.The hardware circuit of the DC converter is designed which include the main circuit, auxiliary and control circuit. Various components are selected and parameters are calculated. Software processes of the converter is designed which include the main program, AD subprogram, PID subprogram and PWM subprogram.Finally, the experimental prototype is built and tested partly, the results prove the certain feasibility and effectiveness of the technical scheme.