ACTIVE POWER FEEDER
THE EFFICIENT AND GRID FRIENDLY
FEED FOR ELECTRIC ARC FURNACES
The Active Power Feeder is a highly
efficient and grid-friendly technology.
It enables steel production at thelowest total cost of ownership,with an exceptional power quality,
all without requiring an additional
compensation system.
YOUR CHALLENGE
The increased focus on eco-friendly
energy and steel production presents
two challenges. On the one hand,renewable energy adoption benefits
the environment, but the intermittencyof sources like wind and solar cancontribute to grid instabilitity. Onthe other hand, steel producers
transitioning towards electrificationto achieve sustainable production
must handle the complexities ofgrid requirements and power quality
featuring renewable power.

OUR SOLUTION
The Active Power Feeder features ahigh-speed electronic actuator for efficient melting. Additionally, the modular multilevel converter (MMC) supplies
balanced real power from the supplying medium voltage bus to the electricarc furnace for new or existing steel
plants in the most “grid-friendly” way.
Here is a summary of the benefits:• fast current control• minimized flicker and harmonics• improved energy efficiency• compensation of additional loads(e.g., ladle furnace)• eliminates additional grid furnacecompensation• enhanced arc stability• reduced electrode consumption• energy and maintenance costsavings• low footprint• flexible installation

primetals.com

MORE EFFICIENTMELTING PROCESS>10X FLICKER
REDUCTIONACTIVE POWER FEEDER
Modular multilevel converters provide significant
advantages in high-power applications. Its modularstructure enables reliability, safety, and redundancy.
Because of the multilevel output voltage, the grid interface
and furnace operation can be controlled precisely with highbandwidth. Fully controllable voltages and currents leadto minimal harmonic distortion and lowest flicker values.
In addition, the output frequency is variable, enabling an
optimized process control.
• Network friendly with greater than 10 times flicker
reduction, featuring low harmonics and power factor ~ 1at PCC (point of common coupling)

Active Power Feeder supply concept• Fast new actuator for electric arc furnace power control,i.e., high-speed control of current fluctuations andstabilization of the arc​

EFFECT ON POWER-ON TIME AND POWERCONSUMPTION• Ability to change the output frequency according todifferent melting stages• Each phase current can be controlled individually without
any negative grid impact
NEWLY INNOVATED CONTROL STRATEGIESThe Melt Expert is a next-generation process-adapted
electrode control system for electric arc furnaces that
automatically adjusts control parameters, improving
melting efficiency and reducing energy consumption
Combined with the Active Power Feeder, Primetals
Technologies offers optimized furnace control for enhanced
productivity.
HIGHLY DYNAMIC CURRENT CONTROL
Our system offers fast and seamless control of arc current,
addressing the limitations of overcurrent issues andsignificantly reducing current fluctuations. Integratingan Active Power Feeder brings various advantages,
including significantly reducing flicker, decreased electrodeconsumption, and less stress on electrical and mechanicalequipment, increasing system availability and longer“maintenance–free” periods.

Increasing active power input brings operational benefits,
such as improvements in power-on-time. This is achievedby dynamic control of the arc power.
Electrode consumption will be reduced through limiting
peak current values. These enhancements optimize
efficency and lower operating costs.

MAIN BENEFITS• Proven modular multilevel converter• Low flicker and harmonic generation• AC furnace operation on weak grids​• Possibility to compensate a ladle furnace on thesame busbar• No additional compensation needed, i.e.,
furnace breaker and furnace reactor ​• Flexible installation outside furnace building​• Increased arc stability​• Increased active power input with high dynamic
current control​• Reduced power-on time and losses, increased
productivity​• Reduced electrode consumption​• ​Longer maintenance–free periods due toreduced stress and wear on equipment​

Primetals Technologies
Germany GmbHA Group Company of Mitsubishi Heavy
Industries
Bunsenstr.43 | 91058 Erlangen | Germany
primetals.com
Order No. T02-1-N774-L4-P-V1-EN
Printed in Linz | © 2023

The information (including, e.g., figures and numbers) provided in this document contains merely general descriptions orcharacteristics of performance based on estimates and assumptions which have not been verified. These estimates and assumptions
have to be analyzed on a case-to-case basis and might change as a result of further product development.
It is no representation, does not constitute and/or evidence a contract or an offer to enter into a contract to any extent and is
not binding upon the parties. Any obligation to provide and/or demonstrate respective characteristics shall only exist if expressly
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