In recent years, there have been growing needs for accurate estimation of photovoltaic (PV) power due to the widespread use of PV power generation. PV power is usually estimated based on the amount of solar radiation, air temperature, and wind velocity. However, when the PV panel is covered with snow, the solar radiation is blocked by the snow and expected PV output cannot be obtained. In this paper, for accurate PV power estimation, we propose an Extended Lambert‐Beer law, and investigate a method to estimate the degree of attenuation of PV power by snow cover. And, accuracy verification of the proposed method is carried out with actual PV power records from when snow accumulated in the Tokyo Electric Power Company (TEPCO) service area in 2018.

中文翻译：

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利用扩展的Lambert-Beer定律估算光伏发电量的方法

近年来，由于光伏发电的广泛使用，对准确估计光伏（PV）功率的需求不断增长。通常根据太阳辐射量，气温和风速来估算光伏发电量。但是，当PV面板被雪覆盖时，太阳辐射会被雪阻挡，无法获得预期的PV输出。在本文中，为准确估算光伏功率，我们提出了扩展的Lambert-Beer定律，并研究了一种估算雪盖对光伏功率衰减程度的方法。并且，从2018年东京电力公司（TEPCO）服务区积雪开始，利用实际的光伏发电记录对所提出方法的准确性进行验证。