These reactors or smoothing reactors are normally connected in series to the rectifier in HVDC systems. Thanks to their high impedance, they reduce the magnitude of harmonic currents to provide a more constant current, protecting the rectifier, and there is also less network flicker.
They may be water or air-cooled, and made of Aluminium or Copper.
They are typically used in steelworks and ferro-alloys DC furnaces but are also found in all sectors using high current DC.
Brar has in-depth knowledge of all high current phenomena and refers to studies on electromagnetic simulations done in collaboration with university laboratories.
The following photos show a series of 8 water-cooled DC ferro-chrome furnace reactors, made of aluminium, with the following characteristics:
Inductance: 500 µH
Nominal Current: 55 kA DC
Rated Voltage: 1,500 V DC
Power losses: 500 KW
Unit weight: 12,000 kg