Method for operating an inverter and inverter comprising a switch between a center point of a DC link and a connection for a neutral conductor of an AC grid

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United States of America Patent

PATENT NO 9923483
SERIAL NO

15163329

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Abstract

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A method of operating a transformerless inverter connected on the input side to a generator and on the output side to a multiphase AC grid and comprising a multi-phase inverter bridge with a switch between a midpoint of a DC intermediate circuit on the input side and a terminal for a neutral conductor of the multiphase AC grid, includes feeding electric power from the DC intermediate circuit into the AC grid by the inverter bridge with the switch closed when first operating conditions are present, and opening the switch when there is a transition from the first operating conditions to second operating conditions different from the first operating conditions. The method further includes feeding electric power from the DC intermediate circuit into the AC grid by the inverter bridge with the switch open when the second operating conditions are present, and closing the switch when there is a transition from the second operating conditions to the first operating conditions.

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Patent Owner(s)

Patent OwnerAddress
SMA SOLAR TECHNOLOGY AG34266 NIESTETAL

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bremicker, Sven Alheim, DE 22 484

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