Design And Application Of Centralized Solar Photovoltaics Model

With the acceleration of fossil energy consumption, "low-carbon economy" has gradually attracted attention around the world. Solar energy will be the core renewable energy to supply the electricity in the future because of its reliability, safety, extensive, environmental friendly and exhaustless. Photovoltaic system can undertake part of the power supplying task by connecting with the public power grid, which can reduce the pressure of the grid. This article creates a photovoltaic system model and discuss the application of the model in real photovoltaic system, including the best installation angle and the storage design.This topic is based on the project of 50MkW centralized photovoltaic plant in Yulin Shaanxi province, and discusses the structure, working principle and main factors of photovoltaic system. As the photovoltaic array is usually fixed on the ground due to reliability requirement of photovoltaic plant, the topic first discusses the best installation angle and builds a model of the best installation angle for Yulin area. Based on this model, the topic calculates the best installation angle and maximum radiation quantity through C++program. The result is proved to be accurate according the comparison with data from local 100kW experimental photovoltaic plant and RETScreen software simulation, and the conclusion is applied on the construction of local 50MW centralized photovoltaic plant. The topic also builds a photovoltaic power storage model based on Yulin area, and discusses the impact from usage or capacity of photovoltaic storage appliance to public power grid during grid connection.According to the discussion of photovoltaic array installation angle and storage appliance, the conclusion as following:1. According to the software simulation result and photovoltaic plants experiment data, the maximum photovoltaic power output can be gotten in Yulin area when the photovoltaic array is headed to the south and have installation angle of 35. And the conclusion is applied to the construction of local 50MW centralized photovoltaic plant.2. When the photovoltaic system needs to meet the basic electricity addition of community which nearby the power plants by comparing whether the system getting the storage appliance or not, we know that the photovoltaic system will meet the electricity addition and help the grid protect stability and safety by getting storage appliance.The conclusions provides optimized way to the centralized photovoltaic model as well as the basis of improving the generating capacity and performance of the photovoltaic plants. The results can contribute to the design and construction of photovoltaic power plants and expand application of centralized photovoltaic system.