Ge Energy Power Conversion Technology Gmbh

Markus Berndt

Owen Jannis Schelenz

Dominik Hofmeyer

The invention relates to a power system with an electric circuit connected between a power grid and a power source. The electric circuit includes a main power converter having main input terminals connected to the power sourceby a DC link and output terminals. The main power converter is controlled by a controller. The electric circuit includes a main transformer having a primary windingand a secondary winding, the primary winding being connected to the output terminals of the main power converter. Main switchgear is connected between the secondary winding of the main transformer and the power grid. An auxiliary transformer has a primary winding connected to the power grid in parallel with the main switchgear and a secondary winding connected to the controller. A pre-charge circuit is connected between the auxiliary transformer and the DC link.

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Berlin, Germany

Markus Berndt