| 摘要 |
A VSC-converter for converting direct voltage into alternating voltage and conversely has at least two phase legs (1-3) with each at least two current valves (4-9) connected in series, the valves consisting of at least a semiconductor element (10) of turn-off type and a rectifying member (11) connected in anti-parallel therewith. A midpoint (12) of the phase leg between said valves is adapted to form a phase output and be connected to a phase (29) of an alternating voltage network. The phase legs (1-3) of the converter are connected in series, and opposite ends of the series connection formed by an outer end of a respective outer phase leg (1-3) in the series connection are intended to be connected to a pole conductor (19, 20) each of a direct voltage network. |
