DC network

Abstract

DC network (100), comprising: a DC busbar (110, 220); a transformer (104, 210) with a primary side and a secondary side; a switching device (106, 206) arranged on the primary side of the transformer, wherein the transformer can be electrically connected on its primary side to an AC network (102, 202); a bidirectional AC / DC converter (108, 218) arranged on the secondary side of the transformer, wherein the AC / DC converter is electrically connected to the transformer on its AC side and to the DC busbar on its DC side; a voltage measuring device (230, 232) configured to detect a voltage on a side of the switching device facing the AC network and a voltage on a side of the switching device facing the transformer;and a control device (226) which is configured: to provide electrical energy on the DC busbar when the switching device is open, to operate the AC / DC converter as a network-forming voltage source and to magnetize the transformer from the secondary side by means of a voltage ramp.