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Spectral mismatch in calibration of photovoltaic reference devices by global sunlight method

机译：全球日光法校准光伏参考设备时的光谱失配

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The state of the art for calibration of photovoltaic reference devices has been reviewed recently. In the global sunlight method the total irradiance is measured by a pyrheliometer and a shaded pyranometer while the device is held at 25℃. The method is supposed to have high repeatability even if the spectral irradiance is not measured, provided that the atmospheric conditions are selected carefully. Here we investigate seasonal variation of this method by calculating the spectral mismatch for crystalline silicon reference solar cells for spectra measured at air mass of 1.5 and the defined reference spectral irradiance. A seasonal variation is found with negligible mismatch for certain periods but significant deviations for other periods. Based on this a modified global sunlight method using global natural sunlight for the calibration of photovoltaic reference devices is proposed, using measured spectral irradiance and applying mismatch correction.
机译：最近已经回顾了用于光伏参考装置的校准的技术水平。在整体日光法中，当设备保持在25℃时，总辐射强度由日射强度计和阴影总辐射计测量。即使未仔细测量光谱条件，该方法即使没有测量光谱辐照度也应具有很高的重复性。在这里，我们通过计算晶体硅参考太阳能电池的光谱失配来研究此方法的季节性变化，该光谱失配是针对在空气质量为1.5时测量的光谱和定义的参考光谱辐照度而进行的。发现季节性变化在某些时期的失配可以忽略不计，但在其他时期则有明显的偏差。在此基础上，提出了一种改进的全局日光方法，该方法使用全局自然日光来校准光伏参考设备，该方法使用测得的光谱辐照度并应用失配校正。

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