Transformer apparatus
AssigneeSiemens Aktiengesellschaft
InventorsMARKUS MATTHIAS GAUDENZ, THOMAS SCHMITZ
Life of this patent
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Abstract
An apparatus for connecting a converter to an AC voltage grid has a grid connection for connection to the AC voltage grid and a converter connection for connection to the converter. The grid connection and the converter connection can be connected to one another via two transformers that are connected in parallel with one another and which, in addition to a primary winding and a secondary winding, are equipped with a tertiary winding. At least one switch is connected in series with each transformer. A connection unit is connected to the tertiary windings of each of the transformers and is configured to connect the tertiary windings to one another.
Claims16
1-15. (canceled)
An apparatus for connecting a converter to an AC grid, the apparatus comprising:
- a grid connection for connection to the AC grid and a converter connection for connection to the converter;
- two transformers for connecting said grid connection and said converter connection to one another, said two transformers being connected in parallel with one another and each having a primary winding, a secondary winding, and a tertiary winding;
- at least one switch connected in series with each said transformer;
- and
- a starter unit connected to said tertiary windings of said two transformers and configured to connect said tertiary windings to one another.
A method for starting a non-magnetized second transformer, wherein the second transformer is connected in parallel with a magnetized first transformer that is in operation and that is connected to an AC grid and to an AC terminal of a converter, and wherein each transformer has a primary winding, a secondary winding, and a tertiary winding, the method which comprises:
- connecting the tertiary winding of the second transformer to the tertiary winding of the first transformer;
- and
- only subsequently connecting the second transformer to the AC grid.
Dependencies are inferred from the claim text.