EVALUATION OF DAILY GLOBAL SOLAR RADIATION ESTIMATION MODELS IN CHINA

Sun Xian; Lei Yangna; Wei Na; Hu Lin; Cheng Lu; He Xiaoai

doi:10.19912/j.0254-0096.tynxb.2025-0390

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (7) : 571-578. DOI: 10.19912/j.0254-0096.tynxb.2025-0390

EVALUATION OF DAILY GLOBAL SOLAR RADIATION ESTIMATION MODELS IN CHINA

Sun Xian¹, Lei Yangna², Wei Na², Hu Lin², Cheng Lu², He Xiaoai²

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Abstract

In this study, the applicability and accuracy of the estimation model of daily global solar radiation in China are systematically evaluated. Based on the measured data of 121 radiation observation stations in China and combined with meteorological factors such as sunshine duration and daily temperature range, five representative models for estimating daily global solar radiation were selected, including nonlinear model （model Ⅰ）, percentage of sunshine model （model Ⅱ）, linear model （model Ⅲ）, B&C model （model Ⅳ） and comprehensive model （model Ⅴ）, and their applicability nationwide was tested. Through the evaluation of indicators such as the mean absolute percentage error （E_MAE）, mean absolute percentage error （E_MAPE）, root mean square error （E_RMSE）, and normalized root mean square error （E_NRMSE）, it is found that Model I and model Ⅲ have the best simulation performance, while model Ⅳ and model V have larger errors. Further analysis indicates that Model I and model Ⅲ have better stability in different climate regions and are suitable for daily global solar radiation estimation nationwide. The research results provide a scientific basis for the assessment of solar radiation resources and the development of solar energy in China.

Key words

solar radiation / model / daily global solar radiation / estimation model validation / error analysis / applicability

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Sun Xian, Lei Yangna, Wei Na, Hu Lin, Cheng Lu, He Xiaoai. EVALUATION OF DAILY GLOBAL SOLAR RADIATION ESTIMATION MODELS IN CHINA[J]. Acta Energiae Solaris Sinica. 2026, 47(7): 571-578 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0390

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