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Intra-hour classification of direct normal irradiance for two sites in Spain and India

Nouri, Bijan and Wilbert, Stefan and Hanrieder, Natalie and Kuhn, Pascal Moritz and Schroedter-Homscheidt, Marion and Pitz-Paal, Robert and Zarzalejo, L.F. and Kumar, Sharad and Goswami, Neeraj and Shankar, Ravi and Affolter, Roman (2018) Intra-hour classification of direct normal irradiance for two sites in Spain and India. SolarPACES 2018 Conference, 2.-5. Oktober 2018, Casaböanca, Marokko.

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Abstract

The magnitude of the direct normal irradiance (DNI) depends on seasonal differences due to the sun-earth geometry, and atmospheric extinction processes caused by aerosols and clouds. The most relevant source for intra-hour variability in the DNI are clouds. Suitable sites for concentrating solar power (CSP) plants have an annual average DNI above approx. 2000 kWh/m². Not only the average DNI but also the temporal and spatial DNI variability on the field has a considerable impact on the dispatched electricity [1]. A classification method based on eight distinct variability classes for 1 minute resolved DNI on an hourly basis is introduced by [2]. In this work, the approach presented by [2] is adapted for an intra-hour application, which is more suitable for CSP applications. Here, we discuss the impact of the considered time window on the classification. Furthermore, the impact of the spatial solar field DNI on the variability classification was studied, using spatially resolved DNI maps of a camera based nowcasting system [3].Moreover, we present the results of a variability classification study, including data of a complete year (2017) for a NETRA facility near New Delhi and the Plataforma Solar de Almería (PSA)

Item URL in elib:https://elib.dlr.de/125539/
Document Type:Conference or Workshop Item (Poster)
Title:Intra-hour classification of direct normal irradiance for two sites in Spain and India
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Nouri, BijanBijan.Nouri (at) dlr.deUNSPECIFIED
Wilbert, StefanStefan.Wilbert (at) dlr.dehttps://orcid.org/0000-0003-3573-3004
Hanrieder, Natalienatalie.hanrieder (at) dlr.dehttps://orcid.org/0000-0002-9671-351X
Kuhn, Pascal MoritzPascal.Kuhn (at) dlr.dehttps://orcid.org/0000-0001-9978-5706
Schroedter-Homscheidt, Marionmarion.schroedter-homscheidt (at) dlr.dehttps://orcid.org/0000-0002-1854-903X
Pitz-Paal, RobertRobert.Pitz-Paal (at) dlr.dehttps://orcid.org/0000-0002-3542-3391
Zarzalejo, L.F.CIEMATUNSPECIFIED
Kumar, SharadNETRA, NTPC LtdUNSPECIFIED
Goswami, NeerajNETRA, NTPC LtdUNSPECIFIED
Shankar, RaviNETRA, NTPC LtdUNSPECIFIED
Affolter, RomanCSP ServicesUNSPECIFIED
Date:October 2018
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Intra-hour DNI variability, DNI maps,
Event Title:SolarPACES 2018 Conference
Event Location:Casaböanca, Marokko
Event Type:international Conference
Event Dates:2.-5. Oktober 2018
Organizer:SolarPACES
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Thermal Technology
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Impact of Desert Environment
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Qualification
Institute of Networked Energy Systems > Energy Systems Analysis
Deposited By: Kruschinski, Anja
Deposited On:21 Dec 2018 13:44
Last Modified:21 Nov 2019 15:51

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