Design And Benefit Research Of Grid Connected Photovoltaic Power Generation System Based On Pvsyst

In recent years, the development of distributed photovoltaic power generation in China is fast, and the application mode of distributed photovoltaic power generation system in building is BIPV, besides the integration of photovoltaic building and the roof photovoltaic power station. Where the roof photovoltaic power plant to the roof of the building as a PV module settings, as the receiving surface of the solar radiation. Rooftop photovoltaic system has such advantages:without the need for additional occupation of land, to save the precious land cost; electric energy self occupied, reduce the transmission and distribution equipment and connected to the power grid investment, reduce the power loss; summer as the peak electricity, coincides with the amount of solar radiation, photovoltaic power generation capacity up to alleviate the peak load power supply pressure, peak shaving effect is obvious; will not have any damage to the ecological environment of pollutant emissions, is conducive to the communication to the public of the green building concept. With its advantages, the roof photovoltaic power generation system has become an important development direction of distributed photovoltaic power generation. Specific work is as follows:First of all, analysied the principle of PV generation system and composition, Classify the PV system and study of photovoltaic battery and inverter, the classification and characteristic parameters and electrical characteristics; contrast roof photovoltaic power generation system relative and other types of photovoltaic power generation system applied in the urban environment difference, on the basis of this, for rooftop photovoltaic power generation system of the design method.Secondly, design building roof photovoltaic power generation system for the residential area in a city environment. To the local district geographical location, weather light illumination condition analysis, demonstrated the feasibility of the location on the application of roof photovoltaic system. Combined with software Pvsyst calculate the best angle square and orientation, shadow analysis, proposed the installation scheme. According to the load situation, design system for non grid connected current type operation mode, and to the load selection; design and selection of photovoltaic battery, an inverter, the analysis of the effect of temperature, irradiance and the conversion efficiency of the battery assembly. After the calculation of the inverter parameters, design group on inverter program, and through the software of the PV power generation system, work out the simulation date, the simulation results are obtained.Finally, the economic benefits and environmental benefits of the roof photovoltaic power generation system are studied. Proposed unit power supply cost, net present value, emission control costs three indicators, the establishment of calculation model, model was applied to the design of simulation system data are obtained to verify the analysis that rooftop photovoltaic power generation system with respect to the traditional thermal power generation, power supply cost difference is very small and has better emission reduction benefits, and centralized terrestrial photovoltaic power generation system compared with economical use of land, reduce the cost and other advantages.