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Uncertainty estimation of spectral matching ratio based power rating of CPV modules

: Steiner, M.; Siefer, G.; Bett, A.W.

Preprint urn:nbn:de:0011-n-4706722 (169 KByte PDF)
MD5 Fingerprint: 54e45987007a16c64704376311ad97f3
Copyright AIP
Created on: 15.6.2018

Siefer, G. ; American Institute of Physics -AIP-, New York:
13th International Conference on Concentrator Photovoltaic Systems, CPV 2017 : 1-3 May 2017, Ottawa, Canada
New York, N.Y.: AIP Press, 2017 (AIP Conference Proceedings 1881)
ISBN: 978-0-7354-1561-4
Art. 060001, 7 pp.
International Conference on Concentrator Photovoltaic Systems (CPV) <13, 2017, Ottawa>
European Commission EC
Horizon 2020-Low Carbon Energy - Developing the next generation technologies of renewable electricity and heating/cooling; 640873; CPVMatch
Concentrating Photovoltaic modules using advanced technologies and cells for highest efficiencies
Conference Paper, Electronic Publication
Fraunhofer ISE ()
Materialien - Solarzellen und Technologie; Photovoltaik; III-V und Konzentrator-Photovoltaik; Servicebereich; Hochkonzentrierende Systeme (HCPV); CalLab PV Modules; IEC 62670; power rating; SMARTS2; spectral irradiance

The concentrator standard conditions are defined in the standard IEC 62670-1. Those conditions demand for spectral conditions equivalent to AM1.5d as described in IEC 60904-3. The power output of CPV modules has to be rated at the concentrator standard conditions and thus at AM1.5d spectral irradiance. According to IEC standard 62670-3 the prevailing spectral conditions have to be characterized using spectral matching ratios (SMR). The SMR values have to be within three percent of unity to allow for standardized power ratings. The SMR values are calculated from component cell sensor readings. The most commonly used component cells are based on lattice-matched triple-junction cell structures with bandgaps of 1.9, 1.4 and 0.7 eV. In this work, the usage of these component cells for power ratings on CPV modules equipped with other types of multi-junction cells is investigated. This investigation is based on representative power outputs of CPV modules. These power outputs were calculated using i) the spectral irradiance modeling software SMARTS2, ii) measured external quantum efficiencies and iii) the two-diode model. The outcome of this investigation is an estimation for the measurement uncertainty of rated CPV module power output when using the SMR filtering approach recommended in IEC 62670-3.