| The traditional energy supply crisis,environmental degradation and a series of energy security problems make the energy system with new energy and renewable energy as the core gradually established.Solar photovoltaic power generation plays an important role in renewable energy.With the support of national clean energy strategy and industrial support policies,great leap forward development has been achieved in recent years.At the same time,power generation has intermittent and nonlinear characteristics,which means that the generator unit may not match the power grid during operation,affecting the stable operation and connection of the power grid.Therefore,it hinders the further promotion and application of photovoltaic power generation.For photovoltaic power generation system,the output power is mainly subjected to the irradiance.But,the irradiance is also influenced by other meteorological factors.Therefore,exploring the meteorological factors affecting photovoltaic power generation is conducive to the stable operation of power grid.This paper has carried out research on the meteorological factors affecting the power of photovoltaic power generation.The main work is as follows:1.Starting from the physical meaning of photovoltaic system power generation principle and combined with the geographical location and environmental characteristics of the power station,the factors affecting the output power of photovoltaic system are analyzed.For a specific photovoltaic system,it is mainly affected by meteorological factors.The meteorological factors of the power station are finally determined as irradiance,temperature,wind speed,air pressure and humidity.By collecting the data of photovoltaic output power and meteorological factors in the same period,the change trend between them is analyzed.Then,from a qualitative point of view,the value of correlation coefficient is used to describe the correlation between meteorological factors and photovoltaic output power.A predictive equation of photovoltaic output power and the meteorological factors was established by combining multiple regression analysis.2.According to the difference of magnitude between photovoltaic output power and meteorological factors,and the small sample characteristics of photovoltaic data,based on the grey correlation,the grey entropy correlation analysis method is introduced to further analyze the effect of meteorological factors.In order to enhance the comparability of data series,the calculation results of different dimensionless processing methods are discussed,and the average method is more suitable.Compared with the results of correlation analysis,the main meteorological factors affecting photovoltaic output are irradiance,ambient temperature,wind speed.3.Based on Ansys numerical simulation software,the temperature field of a single PV module under different irradiance,ambient temperature and wind speed is simulated,and the photoelectric performance under different conditions is analyzed. |
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