Design And Analysis Of Grid-connected Photovoltaic Power Generation System

All of the countries in the world are looking for new energy alternative strategies,as global energy shortage and global warming threaten the economic development and people's health in modern times.It will be the main trend of energy development in the future that developing new energy resources and improving the utilization rate of renewable energy are effective ways to improve the ecology and protect the environment.Solar power is considered as the most potential generation way of new energy power with its clean,continuous,safe and other significant advantages.Based on the demand of domestic consumption of photovoltaic manufacturing capacity and a large number of photovoltaic generation grid-connections,this thesis emphatically studies the whole photovoltaic generation system analysis& design process and its partial key problems.Firstly,the overall design process and method of grid-connected photovoltaic generation system are put forward by combing the system's structure mode and technical index.Secondly,three key aspects of the overall design process,including the evaluation of solar energy capacity,the design of photovoltaic generation system and the design of booster station,are discussed in this thesis.For the evaluation of solar energy potential,evaluation model and method of regional solar resources and solar energy potential capacity are put forward.The calculation method of the key parameters is described.For the design of photovoltaic generation system,the design process and method of photovoltaic generation system are proposed,covering solar cells selection,inverter selection,design of photovoltaic matrix operation mode and installation mode,etc.Subproblems' design model,selection method,technical performance index and calculation method are described,too.For the design of booster station,the design process and method of booster station are proposed,covering booster station selection,electrical primary system design and electrical secondary system design.The typical design model of booster station is established.Finally,take a photovoltaic generation project with detailed analysis data and design in Tianjin as an example,the practicability of photovoltaic generation system's design process and method presented in this thesis is verified.The application results show that the proposed method can effectively guide the design of grid-connected photovoltaic generation system.We hope that the results of this thesis can provide references for the connection design of large-scale photovoltaic generations at present stage in China.