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Downscaling of spatial irradiance based on cloud advection using transfer functions

Ranalli, Joseph and Peerlings, Esther E.M. (2021) Downscaling of spatial irradiance based on cloud advection using transfer functions. In: 48th IEEE Photovoltaic Specialists Conference, PVSC 2021. IEEE. 2021 48th IEEE Photovoltaic Specialists Conference (PVSC), 20.-25. Jun. 2021, Virtual meeting. doi: 10.1109/PVSC43889.2021.9518748. ISBN 978-166541922-2. ISSN 0160-8371.

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Official URL: https://ieeexplore.ieee.org/document/9518748


Spatiotemporal aggregation of solar irradiance occurs when a spatially distributed receiver (e.g. a PV generation facility) collects variable geographically distributed irradiance and reduces it to a single electrical generation output. Models of this phenomenon exist, and are designed to take variability from a single point irradiance monitor and predict how that variability will be reduced by aggregation. We have applied these models in a revered manner to assess whether the models can be used to predict the variability of a single point measurement given an aggregate irradiance time series as an input. Results for an advection-based model show that this approach leads to overprediction of the high frequency variability due to overprediction of the site-to-site correlation. Incorporating predictions of site pair decorrelation from the wavelet variability model can temper the degree of overprediction and produces more realistic point time series. Further work may be warranted to further improve upon these efforts and enable reliable, transfer function-based downscaling of irradiance data.

Item URL in elib:https://elib.dlr.de/147552/
Document Type:Conference or Workshop Item (Speech)
Title:Downscaling of spatial irradiance based on cloud advection using transfer functions
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Ranalli, Josephjar339 (at) psu.eduhttps://orcid.org/0000-0002-8184-9895
Peerlings, Esther E.M.Esther.Peerlings (at) dlr.dehttps://orcid.org/0000-0003-4561-9168
Date:June 2021
Journal or Publication Title:48th IEEE Photovoltaic Specialists Conference, PVSC 2021
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1109/PVSC43889.2021.9518748
Keywords:variability, spatial aggregation, wavelet variability model, transfer function, downscaling
Event Title:2021 48th IEEE Photovoltaic Specialists Conference (PVSC)
Event Location:Virtual meeting
Event Type:international Conference
Event Dates:20.-25. Jun. 2021
HGF - Research field:Energy
HGF - Program:Energy System Design
HGF - Program Themes:Energy System Transformation
DLR - Research area:Energy
DLR - Program:E SY - Energy System Technology and Analysis
DLR - Research theme (Project):E - Systems Analysis and Technology Assessment
Location: Oldenburg
Institutes and Institutions:Institute of Networked Energy Systems > Energy Systems Analysis, OL
Deposited By: Peerlings, M.Sc. Esther E.M.
Deposited On:20 Dec 2021 18:30
Last Modified:31 Jan 2022 13:24

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