Control of extinction angle for a line-commutated converter
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United States of America Patent
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Nov 4, 2003
Grant Date -
N/A
app pub date -
Jul 24, 2002
filing date -
Sep 22, 1999
priority date (Note) -
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Abstract
A method for control of an extinction angle of a line-commutated converter in dependence on a minimum reference value for the extinction angle. The converter has a plurality of valves, each one of the plurality of valves having at least one semiconductor element capable of being fired, and the device has a unit for generating firing control pulses for a commutating valve in dependence on the minimum reference value of the extinction angle according to a given criterion for commutation of a direct current through the converter. The device has a unit for continuously forming an operating value of recovery time for the semiconductor element of a decommutating valve, and a unit for forming the minimum reference value of the extinction angle in dependence of the operating value.
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