High voltage secondary power factor correction system and method for AC furnaces

摘要

A furnace power supply system (10) comprises at least one furnace power supply voltage step-down transformer (12) for stepping down a first voltage V1 to a second voltage V2. A secondary winding (12.2) of the voltage step-down transformer (12) is connectable to at least one electrode (14) of the furnace (16). The power supply system comprises at least one voltage step-up transformer (18), a primary winding (18.1) of which is connected to the secondary winding (12.2) of the voltage step-down transformer (12), to step up the second voltage V2 to a third voltage V3. At least one power factor correction reactive component (20) is connected to the secondary winding (18.2) of the voltage step-up transformer.