Method and circuit arrangement for detecting an arc and photovoltaic (PV) inverter having a corresponding circuit arrangement

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12132443
APP PUB NO 20220360214A1
SERIAL NO

17865606

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Abstract

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The disclosure describes a method for detecting an arc in a direct-current (DC) circuit comprising a DC load, a DC source supplying the DC load, and a circuit arrangement arranged between the DC source and the DC load. A power flow P between an input and an output of the circuit arrangement is suppressed by means of a switching circuit through cyclical interruption such that the power flow P is enabled in an active time window with the first period Δt1 and the power flow P is suppressed in an inactive time window with the second period Δt2. Via detection of an input current Iin flowing at the input and/or an input voltage Uin applied to the input and comparison of values of the input current Iin and/or input voltage Uin detected in the inactive time window with a current threshold value ITH or a voltage threshold value UTH an arc presence criterion is signaled if the input current Iin detected in the inactive time window falls below the current threshold value ITH and/or the input voltage Uin detected in the inactive time window does not exceed the voltage threshold value UTH. The application also describes a circuit arrangement for detecting an arc and a photovoltaic (PV) inverter including such a circuit arrangement.

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Patent Owner(s)

Patent OwnerAddress
SMA SOLAR TECHNOLOGY AG34266 NIESTETAL

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kratochvil, Marcel Kassel, DE 20 237
Otto, Torsten Ahnatal, DE 6 108
Pape, Sybille Vellmar, DE 4 8
Schmitt, Rainer Huenfeld, DE 51 247

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