Study On Grid-Connected Design And Operation Of Distributed Photovoltaic Power Generation

Social and economic development has led to the increasing demand for energy,especially electricity,in production and life activities.The pollution problem of traditional energy is becoming more and more serious,so it is urgent to develop and utilize new green energy.Photovoltaic power generation can not only provide sustainable energy for social and economic development,but also protect the natural ecological environment to the greatest extent.Different from the traditional centralized power generation,distributed photovoltaic power generation has the characteristics of being close to the user and short power supply distance.It can also transmit electric energy to the main grid to meet the power supply of the main grid.On the other hand,distributed photovoltaic power generation also has the advantages of sufficient energy supply,no pollution,convenient installation of distributed photovoltaic power generation equipment,convenient management and maintenance in the later stage,and very wide distribution area.Therefore,it is of great practical significance to carry out the research on the application of distributed photovoltaic power generation technology in this paper.(1)Based on the theory of distributed photovoltaic grid-connected system,this paper analyzes the principle and characteristics of distributed photovoltaic system in detail,and designs the overall structure of distributed photovoltaic power generation.(2)The design of the electrical access system is carried out from the aspects of the general situation of the distributed photovoltaic power grid,the design of the access scheme of the distributed photovoltaic power generation system and the requirements of the distributed photovoltaic power generation system.(3)Analysis and design of photovoltaic cells in distributed photovoltaic grid-connected systems in combination with material selection,support selection and tilt angle selection.Finally,the grid-connected power quality in distributed photovoltaic power generation system is analyzed and studied from harmonic,harmonic current and harmonic voltage.After the design and operation,the distributed photovoltaic grid-connected system designed in this paper system designed in this paper is expected to complete the power generation task of 580.2879 million k W/ years,which can not only save a lot of fossil energy.It can also reduce the emission of harmful gases.