Applicability of Light Induced Luminescence for Characterization of Internal Series-Parallel Connected Photovoltaic Modules

verfasst von
Marc Köntges, Jan Wagner, Michael Siebert, Stefan Bordihn, Carsten Schinke
Abstract

In this article, we present a new method to measure electroluminescence (EL) images of current half-cell PV modules without opening electrical contacts. The method uses the series parallel interconnection of the substrings in the module to power one module half (luminescence part) by illumination of the other module half (generator part). The defect interpretation of the resulting images changes slightly compared to usual EL images. Module defects in the generator part of the module influence the working point of the EL of the luminescence part. The new method has a practical limitation, as an electrical power of about 12.4 kW would be required for bringing the luminescent part into the operating point of the rated short-circuit current. Using infrared light emitting diodes and a working point of half of the nominal short-circuit power brings the needed power down to about 2.4 kW for a 144-cell module. For current Si-based PV modules, the method allows image acquisition times below 1 s per image with conventional silicon sensor-based cameras.

Organisationseinheit(en)
Institut für Festkörperphysik
Externe Organisation(en)
Institut für Solarenergieforschung GmbH (ISFH)
Typ
Artikel
Journal
IEEE journal of photovoltaics
Band
12
Seiten
805-814
Anzahl der Seiten
10
ISSN
2156-3381
Publikationsdatum
23.03.2022
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Elektronische, optische und magnetische Materialien, Physik der kondensierten Materie, Elektrotechnik und Elektronik
Ziele für nachhaltige Entwicklung
SDG 7 – Erschwingliche und saubere Energie
Elektronische Version(en)
https://doi.org/10.1109/JPHOTOV.2022.3156727 (Zugang: Geschlossen)