RT info:eu-repo/semantics/article
T1 Passive electroluminescence and photoluminescence in outdoor photovoltaic modules: synchronous and asynchronous lock-in strategies
A1 Redondo Plaza, Alberto Gregorio
A1 Morales Aragones, José Ignacio
A1 Mateo Romero, Héctor Felipe
A1 Zorita Lamadrid, Ángel Luis
A1 Alonso Gómez, Víctor
A1 Hernández Callejo, Luis
K1 Solar energy
K1 Photovoltaic
K1 Inspection techniques
K1 Luminescence
K1 Electroluminescence
K1 Photoluminescence and Lock-In
K1 3306 Ingeniería y Tecnología Eléctricas
K1 2106.01 Energía Solar
AB Photovoltaic power plants require module inspections to detect failures, thereby avoiding safety issues and optimizing overall operation. Luminescence imaging acquisition offers a viable solution for photovoltaic inspections, providing valuable information about module performance. This article presents a novel technique termed passive electroluminescence and photoluminescence, capable of producing luminescence images under daylight conditions by using sunlight or string current as excitation sources for photoluminescence and electroluminescence modulation, respectively. To achieve this modulation, an electronic board has been developed, which connects within a photovoltaic string and allows for measurements during the normal operation of the plant. The study focuses on analysing two strategies: synchronous and asynchronous lock-in approaches. While the synchronous method requires coordination between the camera and the electronic board, the asynchronous method operates independently of such synchronization. Although both strategies have been successfully validated, results indicate that the asynchronous strategy is faster and simpler to implement, whereas the synchronous approach may yield slightly higher quality results.
PB Elsevier
SN 0038-092X
YR 2026
FD 2026
LK https://uvadoc.uva.es/handle/10324/83993
UL https://uvadoc.uva.es/handle/10324/83993
LA eng
NO Solar Energy, July 2026, 312, 114568
NO Producción Científica
DS UVaDOC
RD 10-abr-2026