Patent ID: 11888439
Assignee: SMA SOLAR TECHNOLOGY AG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC H

Claim 12:
13. A photovoltaic (PV) system comprising:
a PV generator having at least one PV string comprising a series connection of multiple PV modules,
an inverter connected on an input side thereof to the PV string and on an output side thereof to a power supply network, wherein the inverter is configured to:
produce a current signature in the PV string in response to a trigger signal, and subsequently vary, in particular within a second time period Δt2, a voltage UStr of the PV string in order to determine a characteristic curve of the PV string,

a measurement unit configured to detect values assigned to one another for current IStr and voltage UStr of the PV string,
wherein in the at least one PV string, at least one of the PV modules is integrated into the series connection of the PV modules via a DC/DC converter, wherein the DC/DC converter is configured to:
in a first operating mode M1, operate the PV module assigned thereto at a maximum power point by a temporal variation of a conversion ratio of output voltage (UOut) to input voltage (UIn) of the DC/DC converter, and
in a second operating mode M2, operate the PV module assigned thereto at a temporally constant conversion ratio of output voltage (UOut) to input voltage (UIn) of the DC/DC converter, and
assume the second operating mode M2 in response to detection of the current signature contained in a current IStr flowing via the output of the DC/DC converter.