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  4. Uncertainty estimation of spectral matching ratio based power rating of CPV modules
 
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2017
Conference Paper
Title

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

Abstract
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.
Author(s)
Steiner, Marc  
Siefer, Gerald  
Bett, Andreas W.  
Mainwork
13th International Conference on Concentrator Photovoltaic Systems, CPV 2017  
Project(s)
CPVMatch  
Funder
European Commission EC  
Conference
International Conference on Concentrator Photovoltaic Systems (CPV) 2017  
DOI
10.24406/publica-r-398675
10.1063/1.5001433
File(s)
N-470672.pdf (169.07 KB)
Rights
Under Copyright
Language
English
Fraunhofer-Institut für Solare Energiesysteme ISE  
Keyword(s)
  • Materialien - Solarzellen und Technologie

  • Photovoltaik

  • III-V und Konzentrator-Photovoltaik

  • Servicebereich

  • Hochkonzentrierende Systeme (HCPV)

  • CalLab PV Modules

  • IEC 62670

  • power rating

  • SMARTS2

  • spectral irradiance

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