Circuit arrangements for electronically controlled DC grids

A device for switching in a DC voltage grid, the device comprising:

• a first series-connected circuit of hybrid switches having two hybrid switches connected in series in opposite directions and first and second connections, said two hybrid switches each having a parallel circuit containing an uncontrolled current-direction-dependent switch and a controllable switch, wherein a central junction point between said hybrid switches forming a third connection and said two hybrid switches connected in series in opposite directions can be inserted by said first connection and said second connection into a first line of the DC voltage grid;
• two polarized damping elements configured to absorb energy in only one polarity of a terminal voltage present and including first and second polarized damping elements, said first polarized damping element connected to said first connection for said first series-connected circuit of hybrid switches and can be connected to at least one of a second line of the DC voltage grid or a ground potential, said second polarized damping element connected to said second connection of said first series-connected circuit of hybrid switches and can be connected to at least one of the second line of the DC voltage grid or the ground potential;
• and
• a current pulse generator, which in response to a control command generating a unipolar current pulse passing via said third connection and said two polarized damping elements, such that a current direction in one of said hybrid switches can be momentarily reversed.