Low-Cost Electronics for Online I-V Tracing at Photovoltaic Module Level: Development of Two Strategies and Comparison between Them

Morales Aragonés, José Ignacio and Gallardo Saavedra, Sara and Alonso Gómez, Víctor and Sánchez Pacheco, Francisco José and González, Miguel Angel and Martínez, Oscar and Muñoz García, Miguel Angel and Alonso García, María del Carmen and Hernández Callejo, Luis (2021). Low-Cost Electronics for Online I-V Tracing at Photovoltaic Module Level: Development of Two Strategies and Comparison between Them. "Electronics", v. 10 (n. 6); https://doi.org/10.3390/electronics10060671.

Description

Title: Low-Cost Electronics for Online I-V Tracing at Photovoltaic Module Level: Development of Two Strategies and Comparison between Them
Author/s:
  • Morales Aragonés, José Ignacio
  • Gallardo Saavedra, Sara
  • Alonso Gómez, Víctor
  • Sánchez Pacheco, Francisco José
  • González, Miguel Angel
  • Martínez, Oscar
  • Muñoz García, Miguel Angel
  • Alonso García, María del Carmen
  • Hernández Callejo, Luis
Item Type: Article
Título de Revista/Publicación: Electronics
Date: March 2021
Volume: 10
Subjects:
Faculty: E.T.S. de Ingeniería Agronómica, Alimentaria y de Biosistemas (UPM)
Department: Ingeniería Agroforestal
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The measurement of current–voltage (I-V) curves of single photovoltaic (PV) modules is at this moment the most powerful technique regarding the monitoring and diagnostics of PV plants, providing accurate information about the possible failures or degradation at the module level. Automating these measurements and allowing them to be made online is strongly desirable in order to conceive a systematic tracking of plant health. Currently, I-V tracers present some drawbacks, such as being only for the string level, working offline, or being expensive. Facing this situation, the authors have developed two different low-cost online I-V tracers at the individual module level, which could allow for a cost-affordable future development of a fully automated environment for the tracking of the plant status. The first system proposed implements a completely distributed strategy, since all the electronics required for the I-V measurement are located within each of the modules and can be executed without a power line interruption. The second one uses a mixed strategy, where some common electronics are moved from PV modules to the inverter or combiner box and need an automated very short disconnection of the modules string under measurement. Experiments show that both strategies allow the tracing of individual panel I-V curves and sending of the data afterwards in numerical form to a central host with a minimum influence on the power production and with a low-cost design due to the simplicity of the electronics. A comparison between both strategies is exposed, and their costs are compared with the previous systems proposed in the literature, obtaining cost reductions of over 80–90% compared with actual commercial traces.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainRTC-2017-6712-3DOCTOR-PVUnspecifiedDesarrollo de Herramientas Optimizadas de Operación y Mantenimiento Predictivo de Plantas Fotovoltaicas

More information

Item ID: 69032
DC Identifier: https://oa.upm.es/69032/
OAI Identifier: oai:oa.upm.es:69032
DOI: 10.3390/electronics10060671
Deposited by: Profesor Titular de Universidad (interino) Miguel Angel /M.A. Muñoz-García
Deposited on: 10 Nov 2021 10:10
Last Modified: 10 Nov 2021 10:10
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