Method for stabilizing an AC system against reactive-load fluctuations, and a power-factor correction device
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United States of America Patent
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Sep 15, 1998
Grant Date -
N/A
app pub date -
May 30, 1997
filing date -
Jun 13, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In operation, DC arc furnaces generate undesired reactive load fluctuations which are compensated for by a power controller without special compensation reactance. In order to permit a melting operation of the arc furnace in weak AC systems the DC furnace is operated with at least two melting electrodes. A current controller is connected to each cathode via rectifiers. Each cathode is controlled with respect to its spacing from a melt by an electrode adjusting device and an electrode controller. Only one current controller one electrode controller are operationally connected, on an input side, to a power factor controller. Power factor control is thus performed with only one electrode assembly.
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