Optimization Design And Verification Of Rooftop Grid-connected Photovoltaic Power Generation System

In recent years,the contribution rate of photovoltaic power generation to non-fossil electricity in China has gradually increased,that is the proportion of photovoltaic power generation in renewable energy power generation has gradually increased,indicating that photovoltaic power generation has a good development prospect in China.Under this premise,targeted for photovoltaic power generation technology research has certain practical significance,in addition to technology research,development and utilization of the photovoltaic field also has practical research value,combining photovoltaic power generation and building roof is also a kind of research trends,this is a use of photovoltaic building integrated ideas,building roof directly as setting location and operating environment of photovoltaic PV system design method.As the actual utilization area is the roof area of the building,which does not occupy land resources,it is suitable for photovoltaic construction in urban environment.In addition,rooftop photovoltaic system power generation mainly supplies urban electricity,does not need to be equipped with long-distance transmission equipment,reduce investment costs,photovoltaic power generation clean and pollution-free,is one of the national key energy development.Based on these advantages,research on rooftop grid-connected photovoltaic power generation can provide assistance for the development of photovoltaic industry.This article will light,climate and the geography information research and the building block,front roof and building layout research to analyze the combination of the rationality of the design of photovoltaic system,on the basis of the optimization goal,in the case of a building roof top utilization rate,puts forward a practical optimization goal can be achieved under the condition of the roof of the grid photovoltaic power generation system optimization design method,and a certain building in Shenyang area roof as an example,the roof grid photovoltaic power generation system optimization design and validation.First need to understand the research background and significance,as well as research status both at home and abroad,and now and then,from the perspective of the theory part,understand the basic principle of photovoltaic power generation system and the composition and function of each part,research the difference between different photovoltaic systems,on the basis of the master roof characteristics of photovoltaic power generation system,put forward the optimization design method and process.Again according to the optimization design method for roof photovoltaic system preliminary design review,PV systems analysis and verification of the optimization design and the simulation results of the three steps: initial assessment indexes including the solar energy resources,shadow condition,roof available area and system capacity,according to the evaluation of the results of numerical and simulation to determine the feasibility of the rooftop PV system installation;Optimization design of roof photovoltaic system includes system operation mode selection,component selection and parameter determination,cluster design and auxiliary system design.After the design is completed,simulation is carried out with the help of PVSYST software.By analyzing the simulation results and comparing with the original system,the optimization design objective is verified to be established.Finally,the net benefit and cost recovery years of the system are taken as the evaluation indexes of the benefits,and the economic benefit analysis model is established to analyze the economic benefits of the design system,which proves that the design system has higher economic benefits.