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Current–voltage curve translation by bilinear interpolation
Author(s) -
Marion B.,
Rummel S.,
Anderberg A.
Publication year - 2004
Publication title -
progress in photovoltaics: research and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.286
H-Index - 131
eISSN - 1099-159X
pISSN - 1062-7995
DOI - 10.1002/pip.551
Subject(s) - bilinear interpolation , irradiance , interpolation (computer graphics) , photovoltaic system , voltage , open circuit voltage , maximum power principle , power (physics) , mathematics , linear interpolation , control theory (sociology) , electrical engineering , computer science , engineering , physics , statistics , mathematical analysis , optics , telecommunications , thermodynamics , control (management) , frame (networking) , artificial intelligence , polynomial
Abstract By means of bilinear interpolation and four reference current–voltage ( I – V ) curves, an I – V curve of a photovoltaic (PV) module is translated to desired conditions of irradiance and PV module temperature. The four reference I – V curves are measured at two irradiance and two PV module temperature levels and contain all the essential PV module characteristic information for performing the bilinear interpolation. The interpolation is performed first with respect to open‐circuit voltage to account for PV module temperature, and second with respect to short‐circuit current to account for irradiance. The translation results over a wide range of irradiances and PV module temperatures agree closely with measured values for a group of PV modules representing seven different technologies. Root‐mean‐square errors were 1·5% or less for the I – V curve parameters of maximum power, voltage at maximum power, current at maximum power, short‐circuit current, and open‐circuit voltage. The translation is applicable for determining the performance of a PV module for a specified test condition, or for PV system performance modeling. Copyright © 2004 John Wiley & Sons, Ltd.