With the deepening of people’s understanding of solar energy resources and the increasing demand for solar energy resource information, the National Renewable Energy Laboratory (NREL)
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Between 1951 and 1975, the National Weather Service had about 60 observatories measuring total horizontal irradiance (GHI). This group of observatories, although they have their
Robust solar radiation datasets are key to competitive solar project financing. Financiers generally consider solar resources to be stable from year to year compared to
Variations in energy forecasts include: interannual variability, data uncertainty, modeling assumptions and methods. Several of these variables are discussed below. 1. year changeInterannual variation (lAV)
Exceeding Probability Statistics is a statistical measure that describes the probability that a particular value is equal to or exceeds. For example, a 90% exceedance
The variability of solar energy resources affects the technical performance of solar power systems on all time scales. In addition, this variability affects the financial
1. Recording age and variabilityA long-term (20-50 year) solar resource dataset is relatively desirable because it can provide a good indication of long-term changes in
There are generally three sources of valid solar resource data: ground measurements, ground modelling, and satellite images. We will focus on the principles and key
The solar resource curve is different for each location, and will continue to change daily, quarterly, and yearly. Unfortunately, most of the proposed solar power
The solar power generation market has matured in size, with projects (whether individual projects or a combination of smaller projects) reaching a scale that would