Development And Application Of A Solar Photovoltaic Energy System At Urban Public Transit Stations

Boost energy application transition in the urban city is significant to achieve carbon neutral.Establish a solar photovoltaic and battery energy storage system in the existing public transit stations can promote urban space and solar energy utilization.A novel photovoltaic battery-sharing system constructed on the public transit stations(bus station,subway station entrance fabric,public bicycle station,etc.),was proposed in the present study.The photovoltaic array,installed on the roof of the public transit stations,generates solar power to the shared-battery loading in the cabinet.Solar energy stored in the shared-battery can beprovided to the residents in each city station.Development and feasibility verification of the proposed system were conducted in this study for promoting the urban solar energy utilization.A solar energy planning method based on the predictionof solar energy resource and demand was proposed,to manage the layout of the proposed system and evaluate the potential application and benefit.The discussion in this thesis includes the following four aspects:(1)Development and feasibility research of a novel photovoltaic sharing-battery system.Establish the photovoltaic sharing-battery system according to the characteristics of the public transit stations is the initial step.Primarily,illustrate the constitution of the proposed system,the design method of the photovoltaic array unit and the operating mode of the intelligent controlling program.Then establish the calculation formula for the photovoltaic array unit based on battery capacity and solar energy resource of the objective area.A design method for various stations was determined based on the proposed formula.Secondly,validation of the development and technical viability of the proposed system based on the questionnaire and mock-up experiment.Usage intention of shared-battery was obtained by questionnaire to support the demand prediction.A mockup experiment was constructed in Nanning based on the typical meteorological data calculating the photovoltaic array unit formula results.The potential generating capacity of the proposed system was predicted as supporting data for available resource prediction.(2)Development of the layout method of the proposed system.The applicating process was divided into four parts: The first step is to generate the meshes of the objective area.The second step is to predict the available solar energy resource.Establish the formula for predicting the available solar energy resource based on the photovoltaic array unit formula and the POI data of public transit stations,obtained by Python.The third step is to establish the formula for predicting the solar energy demand based on literature research and questionnaire results.The fourth step is to coordinate the solar energy resource and demand.Calculating the proportion and the difference of solar resource and demand for obtaining the distribution of potential solar energy applications.The design for the photovoltaic sharing-battery system was determined by combining the maximum total distance of the stations method and nine-mesh integration method.(3)Application for the actual study of the proposed solar energy system layout method.A case study to validate the proposed solar energy system layout method was conducted by taking an urban area in Nanning as the study object.(4)Benefit evaluation of the proposed photovoltaic battery-sharing system.Analysis of the economic benefit,energy-conserving benefit and promotion viability in the cities of different solar resource of the photovoltaic sharing-battery system for verifying the practical applicability and significance.The results show that the proposed photovoltaic battery-sharing system has viability for providing a novel method of utilization of the urban space and solar energy and supporting the urban energy application transition.The application of the proposed method can provide a theoretical basis and technical support for developing a safe and efficient renewable energy application system.