Design And Implementation Of 800kWp Distributed Photovoltaic Power Generation Project System In Qitaihe City

Due to the rapid development of science and technology and the acceleration of social modernization,the use of energy has gradually increased.At present,the original non-renewable energy sources such as coal and oil are now experiencing a depletion crisis,and at the same time have a lot of bad effects on the environment,economy and society.Solar energy is a highly reliable and renewable clean energy.It does not have the danger of depletion and is clean and pollution-free.As an ideal renewable renewable energy in today's society,it has great construction value for society,economy and technology.Great benefits with the environment.Solar photovoltaic power generation is also important for improving grid structure and improving grid power supply reliability to achieve grid safety.At the same time,this paper will combine the distributed 800 k W photovoltaic power generation project in Qitaihe City to discuss the technical issues considered in grid-connected solar photovoltaic power generation.And analysis.In the beginning,the definition of distributed power supply is expounded in general,and at the same time,the development status of the current social distribution network at home and abro ad is analyzed,which leads to the significance of the research project and the influence of photovoltaic system on the distribution network.Then,according to the existing situation of Qitaihe Ci ty Power Grid in Heilongjiang Province and the local solar radiation quantity and climate environment,the paper analyzes and discusses the technical requirements of building photovoltaic power station in the case of power quality,voltage and frequency anomalies.The preliminary planning of the distributed photovoltaic power generation project of the Qitaihe Maternal and Child Health Hospital.Then through the short-circuit current,reactive power compensation and other operational forms to further demonstrate the access system and selection scheme,analyze the short-circuit current and related parameter requirements of the distributed photovoltaic power generation system to the grid,and then according to the Qitai River introduced in the previous section The background of the power grid is designed to adapt the electrical main wiring scheme for the access system of the distributed photovoltaic power generation project in Qitaihe City.The voltage level of 380 V is selected,and 4 grid-connected points are connected.After comparing and analyzing,the mode of using the self-use margin for Internet access is compared.The main electrical equipment parameters are accurately designed,and the performance requirements are analyzed through analysis to realize the design and operation mode design of the photovoltaic device,the selection of the inverter,the layout of the policy,and the selection and research of other major equipment,as well as the prevention.The lightning protection unit,the overvoltage protect ion and the in-station lighting part are designed for the primary part of the photovoltaic system.Then,according to the operation characteristics and current situation of Qitaihe Power Grid,a secondary system is designed for the photovoltaic power station,that is,the dispatching automation configuration part,the relay protection configuration part and the communication design scheme,so as to clarify the relevant requirements involved in the design to ensure the power grid.It can run safely.Finally,the PVsyst software is used to simulate the design,select ion,operation,cost input and output of the entire photovoltaic power generation system.Then,according to the relevant output data and project budget,the profitability of the PV power plant and the benefits of various aspects are estimated.Analysis and implementation of the scheme design and application of the 800 k W distributed photovoltaic power generation project access system in Qitaihe City.