NDLI: Power-Electronic Transformer Tap-Changer for Increased AC Arc Furnace Productivity

Content Provider	IEEE Xplore Digital Library
Author	Korn, A. Steimer, P.K. Suh, Y. Kolar, J.W.
Copyright Year	2008
Description	Author affiliation: ABB Ltd., Turgi (Korn, A.; Steimer, P.K.) \|\| Power Electron. Syst. Lab., Swiss Fed. Inst. of Technol. (ETH), Zurich (Kolar, J.W.) \|\| Chonbuk Nat. Univ., Chonju (Suh, Y.)
Abstract	The productivity of AC electric arc smelters widely used in the nonferrous metals industry is related to the arc voltage. Attempts to improve productivity with longer arcs and higher arc voltages give rise to power fluctuations which cause voltage flicker and frequent arc reignition failures. The furnace power is commonly regulated by moving the electrode rods to adjust the arc length. A 100 MW AC arc furnace power supply equipped with semiconductor switched regulation windings which greatly enhance furnace power control bandwidth is presented, along with suitable winding arrangements, semiconductor topologies, harmonic filters and commutation methods. This system was simulated together with a Cassie-Mayr dynamic arc model. The simulation model as well as the four-step commutation sequence has been experimentally verified by building and testing a single phase 230 V, 2 kW PWM modulated tap-changer. The simulations and experiments demonstrate that power-electronic transformer tap-changers with the ratings necessary for AC arc furnace power supplies are within reach of current semiconductor technology. They are significantly more effective at AC arc furnace power regulation in terms of device rated power than controlled series reactor approaches.
Starting Page	1
Ending Page	7
File Size	6783467
Page Count	7
File Format	PDF
ISBN	9781424428502
DOI	10.1109/ENERGY.2008.4781009
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-11-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Productivity Electrodes Voltage fluctuations Power supplies Furnaces Smelting Pulse width modulation Metals industry Power system modeling Power semiconductor switches
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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