Primetals Technologies Germany
Sales Team - Active Power Feeder
Julian Magin
Active Power Feeder (APF) is a modern power supply system specially designed for AC Electric Arc Furnaces (EAF). APF utilizes an electronic actuator, the Modular Multilevel Converter (MMC), to supply real power from the supplying medium voltage bus to the electric arc furnace in a very grid-friendly way. High power quality, i.e., low flicker, low harmonic distortion and excellent power factor are achieved. A compensation system is not required and additional power consumers on the bus are compensated. A ground-breaking dynamic process control increases the stability and efficiency of the furnace operation. Furnace current, frequency, and arc voltage are automatically adjusted according to the operational situation, to minimize the current fluctuation, avoid overcurrent and to increase the arc stability. The fast, stepless digital control maintains optimum furnace working points, reduces the power-on time and energy consumption. The strict limitation of overcurrent situations reduces the stress and wear for the electrical and mechanical furnace equipment and results in reduced maintenance and electrode consumption. With APF, the conventional EAF becomes a digital green EAF.
