STUDY ON APPLICATION OF ERA5 DATA TO SOLAR ENERGY RESOURCE ASSESSMENT OVER CHINA&#x02019;S REGION

Zhang Shuangyi; Li Xichen

doi:10.19912/j.0254-0096.tynxb.2021-1604

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (5) : 280-285. DOI: 10.19912/j.0254-0096.tynxb.2021-1604

STUDY ON APPLICATION OF ERA5 DATA TO SOLAR ENERGY RESOURCE ASSESSMENT OVER CHINA’S REGION

Zhang Shuangyi, Li Xichen

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Abstract

The error of solar energy resource parameters from ERA5 reanalysis data is evaluated based on parameters from data of 40 ground observation stations around China. The results show that the regression equations’ coefficient of determination （R²） of the monthly surface global horizontal irradiance from ERA5 data against that from stations is 0.999. The maximum and average root mean square error （RMSE） between data from ERA5 and stations are 8.7 MJ/m² and 4.9 MJ/m², and the maximum and average relative root mean square error （RRMSE） are 2.4% and 1.0%. The maximum and average error of inter-annual variability （IV） between data from ERA5 and stations are 19 MJ/m² and 3 MJ/m², and the maximum and average error of percentage inter-annual variability （PIV） are 0.5% and 0.1%. The maximum and average error of stability between data from ERA5 and stations are 0.013 and 0.003, and the maximum and average percentage errors are 2.9% and 0.8%. ERA5 data is validated in this study to be of good consistency with the observation stations data, and application of ERA5 data to solar energy resource assessment in China is feasible.

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solar energy / solar radiation / solar energy resource / ERA5 / inter-annual variability / stability

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Zhang Shuangyi, Li Xichen. STUDY ON APPLICATION OF ERA5 DATA TO SOLAR ENERGY RESOURCE ASSESSMENT OVER CHINA’S REGION[J]. Acta Energiae Solaris Sinica. 2023, 44(5): 280-285 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1604

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