Analysis of mismatch and shading effects in a photovoltaic array using different technologies

J. Guerrero, Y. Muñoz, F. Ibáñez, A. Ospino

Research output: Contribution to journalConference articlepeer-review

12 Scopus citations

Abstract

In this paper, we analyze the performance of a photovoltaic array implemented in the Universidad Politécnica de Valencia which consists of modules of different technologies and power, connected in series, in order to quantify the energy losses due to mismatch and the effect of the shadows. To do this, the performance of the modules was measured in operation under ambient conditions with field measurement equipment (AMPROBE Solar Analyzer, Solar - 4000), which allows the extrapolation of measures to standard conditions STC. For the data validation, measures under controlled conditions were taken to some modules in the flash test laboratory of the Institute of Energy Technology ITE of Valencia in Spain. Subsequently the array curves measured were validated with a photovoltaic array model developed in MATLAB-Simulink for the same conditions and technologies. The results of this particular array are lost up to 20% of the energy supplied due to the modules mismatch. The study shows the curves and the energy loss due to shadows modules. This result opens scenarios for conceivable modifications to the PV field configurations today, chosen during the design stage and unchangeable during the operating stage; and gives greater importance to the energy loss by mismatch in the PV array.

Original languageEnglish
Article number012007
JournalIOP Conference Series: Materials Science and Engineering
Volume59
Issue number1
DOIs
StatePublished - 2014
EventInternational Congress of Mechanical Engineering and Agricultural Sciences, CIIMCA 2013 - Floridablanca, Santander, Colombia
Duration: 8 Oct 201311 Oct 2013

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