Low-Cost Electronics for Online I-V Tracing at Photovoltaic Module Level: Development of Two Strategies and Comparison between Them
| Autor: | Sara Gallardo-Saavedra, Francisco José Sánchez-Pacheco, María del Carmen Alonso-García, Miguel Angel González, Luis Hernández-Callejo, Oscar Martínez, Víctor Alonso-Gómez, Miguel Angel Muñoz-García, José Ignacio Morales-Aragonés |
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| Rok vydání: | 2021 |
| Předmět: |
Computer Networks and Communications
Computer science 020209 energy Energía Eléctrica lcsh:TK7800-8360 02 engineering and technology Tracing 7. Clean energy online I-V tracer Curvas de intensidad-voltaje 0202 electrical engineering electronic engineering information engineering Electronics Electrical and Electronic Engineering Current–voltage curves business.industry Agricultura String (computer science) Photovoltaic system lcsh:Electronics distributed I-V curve measurement 021001 nanoscience & nanotechnology Power (physics) Moment (mathematics) Hardware and Architecture Control and Systems Engineering Signal Processing Inverter Electrónica 0210 nano-technology business Host (network) Computer hardware automated I-V curve |
| Zdroj: | Electronics, 2021-03, Vol. 10, No. 6 Archivo Digital UPM Universidad Politécnica de Madrid Electronics, Vol 10, Iss 671, p 671 (2021) UVaDOC. Repositorio Documental de la Universidad de Valladolid instname Electronics Volume 10 Issue 6 |
| Popis: | Producción Científica 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. Ministerio de Economía, Industria y Competitividad (project RTC-2017-6712-3) |
| Databáze: | OpenAIRE |
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