Control apparatus for a converter for transmitting electric powe

Details Control apparatus for a converter for transmitting electric powe Control apparatus for a converter for transmitting electric powe

1997-10-15

1999-11-16

Riley, Shawn

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 54, 363128, H02H 700

Patent

active

059869038

ABSTRACT:
A plant for transmitting electric power between a direct voltage network and an alternating voltage network through a power station. A converter of a station has two current valves connected in series, each having one turn-on and turn-off type breaker and a diode connected anti-parallel therewith. Circuits are provided to detect the direction and the intensity of the current through the converter, as well as the current valve through which it flows to actuate the control apparatus on the basis of the detected current level and the identity of the valve carrying the current. The control apparatus operates to commutate current through the valve which is not carrying current when a detected current level in the current carrying valve exceeds a first predetermined level.

REFERENCES:
patent: 4638416 (1987-01-01), Neupauer et al.
patent: 4719554 (1988-01-01), Bertschi
patent: 4847744 (1989-07-01), Araki
patent: 4941079 (1990-07-01), Ooi
patent: 5214575 (1993-05-01), Sugishima et al.
patent: 5371664 (1994-12-01), Seki
patent: 5798916 (1998-08-01), Stacey et al.
Patent Abstracts of Japan, Method of Controlling Inverter Device Using Self Extinguishing Semiconductor Element, Abstract of JP 7-231674 A (Hitachi Ltd.), 1995/Aug.

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