Photovoltaic inverter and method for operating a photovoltaic inverter

Photovoltaic inverter and method for operating a photovoltaic inverter

The invention relates to photovoltaic inverter (2) with a DC input (3) for connection to a DC source (4), a DC-DC transformer (9), a DC bus (10), a DC-AC converter (11), an AC isolator (8), a control device (13), an AC connection (5) for connection to a supply network (6) and perhaps a consumer (7),...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: OVERBECK, Ruben, WALLISCH, Gerhard
Format: Patent
Sprache:eng
Schlagworte:
APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER
CONTROL OR REGULATION THEREOF
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:The invention relates to photovoltaic inverter (2) with a DC input (3) for connection to a DC source (4), a DC-DC transformer (9), a DC bus (10), a DC-AC converter (11), an AC isolator (8), a control device (13), an AC connection (5) for connection to a supply network (6) and perhaps a consumer (7), a battery stage (16), and a battery connection (14) for connection to a buffer battery (15), and to a method for operating a photovoltaic inverter (2) of this kind. According to the invention, a switched-mode power supply (18) is provided, which switched-mode power supply (18) is connected on the input side to the AC connection (5) and on the output side to the battery stage (16) so that, if the DC source (4) is deactivated, the DC bus (10) can be charged to a threshold value through the switched-mode power supply (18) and the battery stage (16), wherein the AC isolator (8) can be actuated and the photovoltaic inverter (2) can be connected to the supply network (6).