Observations in PV module operation voltage distribution along a PV array. An in-deep look on mismatch losses

Rossa, Carlos Henrique and Martinez Moreno, Francisco and Lorenzo Pigueiras, Eduardo (2018). Observations in PV module operation voltage distribution along a PV array. An in-deep look on mismatch losses. In: "35th European Photovoltaic Solar Energy Conference and Exhibition", 24/09/2018-27/09/2018, Bruselas, Bélgica. ISBN 3-936338-50-7. pp. 2051-2055. https://doi.org/10.4229/35thEUPVSEC20182018-6DV.1.38.

Description

Title: Observations in PV module operation voltage distribution along a PV array. An in-deep look on mismatch losses
Author/s:
  • Rossa, Carlos Henrique
  • Martinez Moreno, Francisco
  • Lorenzo Pigueiras, Eduardo
Item Type: Presentation at Congress or Conference (Article)
Event Title: 35th European Photovoltaic Solar Energy Conference and Exhibition
Event Dates: 24/09/2018-27/09/2018
Event Location: Bruselas, Bélgica
Title of Book: Proceedings of 35th European PV Solar Energy Conference and Exhibition
Date: 2018
ISBN: 3-936338-50-7
Subjects:
Freetext Keywords: voltage dispersion; real time monitoring PV generators; mismatch losses; power loss estimation
Faculty: E.T.S.I. y Sistemas de Telecomunicación (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Considering that the current through all the PV modules of a same string is constant, any differences in the electrical behaviour of the modules give raise to differences in the corresponding operation voltages. That opens the door for careful observations of the PV array functioning carried out under normal operation conditions, that is, with the inverter delivering energy and, thus, without the need for disconnection as required for more standard PV array analysis methods: measuring I-V curves, open-circuit voltages and so on. This in-routine operation observation procedure is relatively easy implemented in practice, by means of ?T? shaped quick connectors to connect PV modules to each other, which are widely commercially available. In fact, this has been successfully applied to in-the-field PID detection on commercial PV plants, by monitoring the voltage differences between the modules at the extreme poles of the string. This time, we have applied such observation procedure to all the 21 PV modules comprising a 5 kW PV array connected to the grid at the IES-UPM terrace. Moreover, we have also glued a PT1000 in the back of each module. Together with a PV reference module for measuring in-plane irradiance, this set-up allows for continuous and simultaneous monitoring of, both, the operation conditions (irradiance and temperature) and the electrical response (current and voltage) of all the PV modules.

More information

Item ID: 55429
DC Identifier: http://oa.upm.es/55429/
OAI Identifier: oai:oa.upm.es:55429
DOI: 10.4229/35thEUPVSEC20182018-6DV.1.38
Official URL: https://www.eupvsec-proceedings.com/proceedings/dvd.html
Deposited by: Memoria Investigacion
Deposited on: 19 Feb 2020 11:56
Last Modified: 19 Feb 2020 11:56
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