Bidirectional VSC converter with a resonant circuit

Details Bidirectional VSC converter with a resonant circuit Bidirectional VSC converter with a resonant circuit

2005-05-24

2005-05-24

Sterrett, Jeffrey (Department: 2838)

Electric power conversion systems

Current conversion

Using semiconductor-type converter

C363S056050, C363S056120

Reexamination Certificate

active

06898095

ABSTRACT:
The invention relates to a VSC-converter for converting direct voltage into auxiliary voltage and vice versa, which comprises a series connection of at least two current valves (5, 6) arranged between two poles (7, 8), a positive and a negative, of a direct voltage side of the converter, each current valve comprising several series connected circuits (12), each of which circuits comprising a semiconductor component (13) of turn-off type and a rectifying component (14) connected in anti-parallel therewith, an alternating voltage phase line (16) being connected to a midpoint (15), denominated phase output, of the series connection of current valves (5, 6) between two of said current valves while dividing the series connection into two equal parts. Each of the series connected circuits (12) of the respective current valve comprises, in order to make possible a good voltage distribution between the semiconductor components (13) of turn-off type included in the respective current valve, a snubber capacitor (17) connected in parallel with the semiconductor component (13) of turn-off type included in the circuit. The converter (1) further comprises a resonance circuit (18) for recharging the snubber capacitors (17) of the current valves.

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patent: 6519169 (2003-02-01), Asplund et al.
patent: 6603675 (2003-08-01), Norrga

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