Method for controlling an electronic power converter that is connected to a direct-current source
A technology of DC voltage source and converter, which is applied in the direction of converting AC power input into AC power output, output power conversion device, electrical components, etc.
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[0026] FIG. 1 shows a DC grid coupling 1 for supplying an isolated grid 2 via a supply grid 3 . The power supply grid 3 is connected to the high voltage DC bridge 1 through a transformer 4 and the isolated grid 2 is connected to the high voltage DC bridge 1 through a transformer 5 , wherein the switches 6 and 7 are configured to disconnect the high voltage DC bridge 1 from the power supply grid 3 and the isolated grid 2 respectively.
[0027] The DC grid coupling 1 has two converters with self-guiding power semiconductor switches 10 in the form of a six-pulse bridge circuit (6-puls-Brueckenschaltung). A freewheeling diode is arranged in the parallel connection of each power semiconductor switch 10 . The converters 8 and 9 are connected to each other via a DC intermediate circuit 12 which is connected to each other forming a positive DC terminal marked with a "+" sign and a negative DC terminal marked with a "-" sign. An energy store in the form of a capacitor 13 is connected ...
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