The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 04, 2018
Filed:
May. 13, 2016
Sma Solar Technology Ag, Niestetal, DE;
Alexander Unru, Niestetal, DE;
Harald Drangmeister, Kassel, DE;
Tobias Mueller, Staufenberg, DE;
Pablo Correa Vasquez, Bad Neustadt an der Salle, DE;
SMA Solar Technology AG, Niestetal, DE;
Abstract
A method for determining capacitance values of capacitances of a photovoltaic system including a multiphase inverter which includes an output current filter on an alternating current side thereof and is connected to a multiphase energy supply network via a switching element and is associated with at least one intermediate circuit capacitance on the direct current side thereof is provided. The method includes disconnecting the photovoltaic system from the energy supply network by opening the switching element; operating the inverter to set up an island network after the disconnecting, wherein an in-phase AC voltage is applied to at least two outputs of an inverter bridge of the multiphase inverter and a flow of current is produced between the at least one intermediate circuit capacitance and at least one filter capacitance of the output current filter; measuring currents (Ia, Ib, Ic) flowing at the outputs of the inverter bridge and at least one voltage present at one of the capacitances, and determining a capacitance value of at least one of the capacitances using the determined voltage and the measured currents (Ia, Ib, Ic).