Identification of periods of clear sky irradiance in time series of GHI measurements

RENEWABLE ENERGY

卷:90

Article

Reno, Matthew J.¹  Hansen, Clifford W.¹ 

[1] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA

关键词: Solar resource;    Global horizontal irradiance;    Clear sky;   

DOI  :  10.1016/j.renene.2015.12.031

来源: Elsevier

【 摘 要 】

We present a simple algorithm for identifying periods of time with broadband global horizontal irradiance (GHI) similar to that occurring during clear sky conditions from a time series of GHI measurements. Other available methods to identify these periods do so by identifying periods with clear sky conditions using additional measurements, such as direct or diffuse irradiance. Our algorithm compares characteristics of the time series of measured GHI with the output of a clear sky model without requiring additional measurements. We validate our algorithm using data from several locations by comparing our results with those obtained from a clear sky detection algorithm, and with satellite and ground-based sky imagery. (C) 2015 Elsevier Ltd. All rights reserved.

【 授权许可】

Free