DETERMINATION AND MONITORING OF SERIES RESISTANCE OF A PHOTOVOLTAIC DEVICE OR SYSTEM FROM VOLTAGE FACTOR

Computer-implemented methods, devices and computer programs for determination and monitoring of series resistance of a PV device or system. One of the methods comprises: computing a voltage factor, VF, of the PV device/system as a ratio between: an open circuit voltage, Voc, and a voltage at a maxim...

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Bibliographische Detailangaben
Hauptverfasser:	Garcia Zambrano, Laura, Riaño Fernandez, Sandra, Esteras Bejar, Miguel, Alonso Segade, Ricardo, Santos Rodríguez, José Domingo
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-REDRADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, E.G. USINGPHOTOVOLTAIC [PV] MODULES MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING
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Beschreibung
Zusammenfassung:	Computer-implemented methods, devices and computer programs for determination and monitoring of series resistance of a PV device or system. One of the methods comprises: computing a voltage factor, VF, of the PV device/system as a ratio between: an open circuit voltage, Voc, and a voltage at a maximum power generation, VMPP; computing a partial derivative of VF with respect to a current at the maximum power generation, IMPP; computing a first ratio between: a product of a predetermined constant, n, associated with the device/system times a thermal voltage, VTH, and IMPP; computing a second ratio between VMPP and Voc; and computing a value for a series resistance, Rs, at least based on: a product of the partial derivative of VF and Voc; and a product of the first ratio and the second ratio.