| Building a new power system with renewable energy as the main body is one of the important approaches to help China to achieve its strategic goal of “carbon peak”and “carbon neutrality”.Solar photovoltaic power systems have been extensively used which can be attributed to zero carbon emissions,high conversion efficiency,no geographical restrictions,long lifespan,easy installation and maintenance,and other advantages.There are a lot of idle building roofs in university campuses,such as teaching buildings,office buildings and student dormitories,which are ideal for installing photovoltaic power systems to promote the large-scale application of renewable energy in university construction.Photovoltaic power systems installed on university rooftops can not only provide clean energy to satisfy partial energy demands of campus buildings,but also play a demonstration and driving role in green and low-carbon education on campus.This is of significant importance for achieving China’s dual carbon goals and mitigating global climate change.Based on this,this thesis compares in detail the research progress of campus photovoltaic power generation systems in colleges and universities at home and abroad,and takes three typical colleges and universities located in different solar resource distribution regions in China as examples to evaluate the geographical potential,technical potential,economic and environmental benefits of campus rooftop photovoltaic power generation systems.The main research contents of this thesis are as follows:Firstly,this thesis discusses the identification method of rooftop areas suitable for installation of photovoltaic power systems in university campuses,introduces the main factors which affect the technical potential of photovoltaic power systems,and determines the economic evaluation model and environmental benefit assessment methods of photovoltaic power systems.Secondly,Tibet University,Qinghai University,and Shandong University located in Zone I,Zone II and Zone III irradiation areas in China are selected as the study cases.Loca Space Viewer,a 3D digital earth software,is used to determine the rooftop type and utilizable areas for photovoltaic systems.The potential installation capacity,annual power generation and total power generation of rooftop photovoltaic systems under five scenarios for flat rooftops and two scenarios for pitched rooftops for three studied universities.A variety of economic indicators are used to investigate the economic performance of the photovoltaic systems in case of “full-self-consumption”and “full-feed-into-grid” operation modes,including lifetime net income,levelized cost of electricity,internal rate of return,net present value and return on investment.In addition,economic comparison among different installation scenarios and operation modes is carried out for three study cases.In combination with above results,environmental benefits of photovoltaic power systems are analyzed and quantified under different installation scenarios in the three universities.Finally,in order to solve the impact of the random,intermittent and fluctuating nature of PV power generation on the safe and stable operation of the campus grid,the thesis further takes three typical buildings of Shandong University,namely,academic,residential and office buildings,as research cases,and establishes the scheduling model of PV energy storage system using Matlab software.The technical potential and economics of PV energy storage systems in three typical buildings are compared and analyzed under two operation modes: “full-feed-into-grid” and “self-consumption +surplus-feed-into-grid”. |
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