Research On Maximum Power Point Tracking Of Single PV Module For Building Integrated Photovoltaic Systems

Building energy efficiency and low-carbon emissions are taken seriously by people. Reduce energy consumption and environmental pollution by building energy consumption as one of the current international topics. Because of its advantages of clean, pollution-free and inexhaustible, solar energy is developing and using by countries in the world. Large numbers of front surface of the building has not bring economic benefits, combine solar electrical energy generation system with building is not only reducing the cost of solar power systems facilities, but also reducing the power loss by long-distance transmission of solar electrical energy generation system. Along with the rapid development of technology, photovoltaic building will certainly to become an efficient path of the new energy and building energy conservation. This article studies the efficiency problem of Building Integrated Photovoltaic (BIPV).In order to realize the high efficiency of BIPV system, this paper research on electrical structure of photovoltaic system. Discussing the main differences between conventional DC / DC converter and the DC / DC converter of photovoltaic system. Using the soft switch technology can appropriately increase the switch operating frequency, and reduce size and weight of converter. In the theoretical analysis foundation, choosing the improved Boost-ZVT-PWM circuit as an experimental prototype of the main circuit topology. In order to reduce the mismatch phenomenon between of solar panels, a DC-module-based BIPV system is proposed in this paper which can improve power generation efficiency, and provide AC/DC power to the building at the same time.This paper proposes a new control algorithm. In the foundation of modeling and simulation analysis of solar panel, research on the Maximum Power Point Tracking (MPPT) control technology of the BIPV. On the basis of analysis and comparison of common MPPT algorithms, proposing a new improved perturbation and observation (P&O) arithmetic. The algorithm has all the advantages of the perturbation and observation method, while improving the tracking speed of perturbation and observation and reducing the complexity of the controller, and verifies the feasibility and superiority of the control algorithm through the simulation.The hardware circuit of the converter was designed, including the main circuit, auxiliary circuit and control circuit. Parameters calculation and reasonable selection of various component parameters are gaven out in the circuit. At the same time, software processes of the converter is designed, including the main program, MPPT control procedures and PWM drive waveform generation method. For actual problem which appears in view of the experiment, improving the MPPT control algorithm and proposing the feasible solution.Finally, the experiment results prove the validity and feasibility of the technical scheme in this paper.