Research On The Distribution Of Wind Energy And Solar Energy Resources And Meteorological Influence Factors In Sichuan

In this paper,the distribution characteristics of wind and solar energy resources over Sichuan province is obtained by two methods of calculation of observation data and numerical simulation.First,when using the station data to calculate the radiation value indirectly,some improvements are made to the algorithm of the empirical coefficient in the climatological calculation formula.The influence of meteorological factors on the distribution of solar energy resources is discussed.Also,the feasibility of Reg CM in wind and solar energy resources assessment over Sichuan province is discussed.The main research contents and conclusions are as follows:(1)In order to make the empirical coefficient more suitable for Sichuan area,Using cluster analysis method,152 stations in Sichuan were divided into 4 districts with sunshine percentage as the classification standard.The empirical coefficients were calculated by region and month,and then the radiation values of each station were obtained.The Comparison of observed and calculated values of 7radiation stations in Sichuan province shows that the average value of the absolute relative error is 3.5%,and it is as high as 10% when there is no partition,indicating that the calculation accuracy is significantly improved.The spatial distribution of solar energy resources over Sichuan province is obtained by interpolating the calculated results.Partial correlation analysis was conducted between the clear sky index and other meteorological factors.According to the partial correlation coefficient,the change of radiation weakening in southwest Sichuan and basin was most closely related to the low cloud cover.The plateau region was greatly affected by precipitation,while the eastern edge of the plateau was greatly affected by relative humidity.(2)The latest version of Reg CM4.6 and CLM4.5 land surface model was used for simulation research.Compared with the worth to the radiation distribution of stations,The model can realistically simulate the distribution characteristics of Sichuan “high value over western and low value over eastern”,and the high and low value centers are more consistent with the calculated values of the stations.The model results are interpolated to 7 radiation sites,and the obtained monthly radiation simulation values are in good agreement with the actual observation values,which shows that model can simulate the monthly variation characteristics of the radiation.The average correlation coefficient between the simulated value and the observed value of 7 stations was 0.75.The above results show that Reg CM mode has good simulation ability for radiation value and can be introduced into solar energy resource assessment as a new mode method.(3)The wind speed simulation value is higher than the observed value.According to the correlation coefficient between the monthly wind speed of simulation value and the observed value,the correlation coefficient over southwest Sichuan is above 0.7,while the overall correlation coefficient over northwest Sichuan is lower than 0.5,indicating that the model has the best simulation effect on the wind speed in southwest Sichuan.(4)Based on the model results and station calculation results,it is found that the Litang-Batang,Aba-Ruoergai,Ganzi-Luhuo and Daocheng-Muli in the western sichuan plateau are of high value of solar energy resources.The observed and simulated wind energy resources in Danba area are abundant.The conclusion of this paper provides a basis for the development of wind and solar energy resources.(5)The land and vegetation coverage data selected in this model are far from enough to describe the information of soil and surface types over Sichuan,which leads to the radiation outliers in the area of xinlong-yajiang.This view can be supported by the surface albedo value >1 of the model data.Therefore,topographic data suitable for Sichuan should be selected in future research work.