Access Scheme Optimization And Benefits Analysis For Poverty Alleviation Project Of Distributed Photovoltaic Generation Based On PVsyst

In recent years,in order to mitigate the environmental pollution and ecological damage provoked by the use of traditional fossil energy,strengthen energy security and avoid the energy crisis,the research and application of renewable energy sources in various countries have become more comprehensive.Of it,solar energy has developed rapidly with the advantages of low carbon,few geographical restriction and inexhaustibility.And distributed photovoltaic(PV)power as an applicable method of solar energy,has played an indelible role in the energy structure transition in our country,the development of the electric power industry as well as the promotion of poverty alleviation work,which is also an essential part of industry layout and investment operations in the future integrated energy services of power grid enterprises.This thesis is concentrated on the application of distributed PV power system in rural areas,which has theoretical support and practical application value.Firstly,this thesis introduces the present status of renewable energy at home and abroad,analyses the relevant policies,project designs and access impacts of distributed PV power generation at home and abroad,summarizes the classification and structure of three kinds of distributed PV power systems.Taking grid-connected power system as mainline,the system structure,the operating principle of each equipment,the calculation of tilt angle and pitch of PV modules are expounded.Secondly,this thesis takes an operational distributed PV generation for poverty alleviation project in rural area in Zhanjiang,Guangdong province as the research object,and simulates the actual interconnection scheme,in hopes of taking reference action on the design and modeling of distributed PV power generation projects in general rural areas.Based on the global meteorological data analysis software named Meteonorm and the professional PV power system design software named PVsyst,this thesis puts forward two kinds of simulation modes: “Simulation mode with unified tilt angle of PV modules” which applies the average tilt angle of modules,and “Simulation mode with unified tilt angle of PV string” which utilizes the major tilt angle of modules in each PV string.By comparing the power generation data of the simulations and the backend of inverters,this thesis analyses the differences among these data and reaches the conclusion that the latter is more corresponding to the operational project,then the benefits of economy and environment in this project are illustrated.Finally,three access scheme optimizations of this project against the main affecting factors of performance ration is put forward,including equipment selection,equipment topology,power grids upgrading and equipment maintenance.And the simulation result of the optimized projects mi feasibility of the optimized schemes.