Clear-sky direct normal irradiance estimation based on adjustable inputs and error correction

摘要: The accurate estimation of direct normal irradiance (DNI) under clear sky conditions plays an important role in the concentrated solar thermal plant. A hybrid model with adjustable inputs is proposed to calculate clear-sky DNI, including a base and error-correction model. able estimate DNI at any place only local date location information, serves as supplementary improve calculating accuracy available meteorological data. effectively integrates linear part nonlinear part, its are according observations. Several experiments have been conducted evaluate performance data from three observation stations provided by National Renewable Energy Laboratory open database. results show that provide great improvement over 28%–70% on normalized root mean square error, it also performs better than those using or error correction It concluded comparable other published methods concrete statistics.The databa...