AU2001216972A1 - Automatic electrode regulator based on direct power factor regulation - Google Patents

Automatic electrode regulator based on direct power factor regulation

Info

Publication number
AU2001216972A1
AU2001216972A1 AU2001216972A AU1697201A AU2001216972A1 AU 2001216972 A1 AU2001216972 A1 AU 2001216972A1 AU 2001216972 A AU2001216972 A AU 2001216972A AU 1697201 A AU1697201 A AU 1697201A AU 2001216972 A1 AU2001216972 A1 AU 2001216972A1
Authority
AU
Australia
Prior art keywords
electrode
power factor
transformer
control unit
transducer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
AU2001216972A
Inventor
Jorg Eiermann
Till A. Schreiter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Demag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24686882&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=AU2001216972(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of AU2001216972A1 publication Critical patent/AU2001216972A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/144—Power supplies specially adapted for heating by electric discharge; Automatic control of power, e.g. by positioning of electrodes
    • H05B7/148—Automatic control of power
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Discharge Heating (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Generation Of Surge Voltage And Current (AREA)
  • Control Of Eletrric Generators (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)

Abstract

Disclosed is an electrode control system for an electric arc furnace having a furnace transformer. The electrode control system includes a current transformer for measuring operating current of the electrode and a voltage transformer for measuring operating voltage of the electrode. An active power transducer is connected to the current transformer and the voltage transformer for calculating active power of the electrode from the measured operating current and operating voltage as a first output signal. A reactive power transducer is connected to the current transformer and the voltage transformer for calculating the reactive power of the electrode from the measured operating current and operating voltage as a second output signal. A programmable control unit is connected to the active power transducer and the reactive transducer for receiving the first and second input signals. The control unit is configured to calculate actual power factor of the electrode from the first and second output signals and compare the actual power factor with a preprogrammed power factor set point. The control unit is configured to generate a control signal indicative of a difference between the actual power factor and the power factor set point. An electrode positioning mechanism is provided for controlling movement of the electrode. The electrode positioning mechanism is connected to the control unit for receiving the control signal and is configured to adjust a vertical height of the electrode such that the actual power factor approximates the power factor set point. A method of controlling the position of an electrode in an electric arc furnace is also disclosed.
AU2001216972A 2000-09-26 2000-10-26 Automatic electrode regulator based on direct power factor regulation Abandoned AU2001216972A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09669582 2000-09-26
US09/669,582 US6411643B1 (en) 1999-09-30 2000-09-26 Automatic electrode regulator based on direct power factor regulation and method
PCT/EP2000/010543 WO2002028146A1 (en) 2000-09-26 2000-10-26 Automatic electrode regulator based on direct power factor regulation

Publications (1)

Publication Number Publication Date
AU2001216972A1 true AU2001216972A1 (en) 2002-04-08

Family

ID=24686882

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001216972A Abandoned AU2001216972A1 (en) 2000-09-26 2000-10-26 Automatic electrode regulator based on direct power factor regulation

Country Status (6)

Country Link
US (1) US6411643B1 (en)
EP (1) EP1329137B1 (en)
AT (1) ATE347247T1 (en)
AU (1) AU2001216972A1 (en)
DE (1) DE50013822D1 (en)
WO (1) WO2002028146A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050154611A1 (en) * 2004-01-13 2005-07-14 Sgl Carbon, Ag Product support method for industrial processes
DE102005051232A1 (en) * 2005-10-26 2007-05-03 Sms Demag Ag Control device for alternating current reduction furnaces
DE102007041632A1 (en) * 2006-09-18 2008-04-03 Sms Demag Ag Melt-metallurgic furnace i.e. electric arc furnace, operating method, involves feeding correcting variables to mediator from control or regulating and fuzzy regulating unit and calculating actuating signal by mediator from variables
DE102014206008A1 (en) * 2014-03-31 2015-10-01 Siemens Aktiengesellschaft Apparatus and method for dynamically adjusting an electric arc furnace
CN104459306B (en) * 2014-12-18 2017-02-22 东北大学 Power demand quantity remote monitoring system and method for magnesium electrical smelting group furnaces
RU176886U1 (en) * 2017-09-20 2018-02-01 Федеральное государственное бюджетное образовательное учреждение высшего образования "Магнитогорский государственный технический университет им.Г.И.Носова" Electric arc furnace impedance control device

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3186043A (en) 1963-04-02 1965-06-01 Allegheny Ludlum Steel Metallurgical furnace control
US3229148A (en) 1963-04-22 1966-01-11 Mc Graw Edison Co Arc furnace electrode control
US3209060A (en) 1963-06-12 1965-09-28 Westinghouse Electric Corp Electrical apparatus
US3435121A (en) 1966-03-17 1969-03-25 Allegheny Ludlum Steel Arc power responsive control system for consumable electrode furnace
BE758327A (en) 1969-10-30 1971-04-01 Nippon Kokan Kk METHOD AND SYSTEM FOR REGULATING ELECTRIC OVEN
US3767832A (en) 1972-08-17 1973-10-23 G Bennett Automatic electrode control
US4029888A (en) 1976-05-27 1977-06-14 Robicon Corporation Arc furnace control system
US4096344A (en) 1976-09-30 1978-06-20 Westinghouse Electric Corp. Electric arc furnace control system
DE2948787C2 (en) 1979-12-04 1984-05-03 Siemens AG, 1000 Berlin und 8000 München Arrangement for the electrode control of an electric arc furnace
DE3242934A1 (en) 1982-11-20 1984-05-24 Mannesmann Rexroth GmbH, 8770 Lohr CONTROL DEVICE FOR ADJUSTING THE ELECTRODE OF AN ARC FURNACE
SE452840B (en) 1983-10-31 1987-12-14 Asea Ab CONTROL SYSTEM FOR DIGITAL LIGHT REAR OVEN
US4677643A (en) 1984-03-09 1987-06-30 Licentia Patent-Verwaltungs-Gmbh Device for feeding one or a plurality of electrodes in an electrothermal furnace
DE3512189C2 (en) * 1985-04-03 1996-09-05 Mannesmann Ag Method and device for controlling arc furnaces
US4620308A (en) * 1985-10-30 1986-10-28 Lectromelt Corporation Arc furnace electrode control
JPS63242135A (en) 1987-03-27 1988-10-07 三菱電機株式会社 Reactive power compensator
IT1236363B (en) 1989-11-30 1993-02-25 Danieli Off Mecc DIRECT CURRENT ELECTRIC ARC OVEN AND CONTROLLED CURRENT SUPPLY PROCEDURE OF A DIRECT ARC ARC OVEN
US5155740A (en) 1990-10-22 1992-10-13 Nkk Corporation Flicker compensating apparatus for DC arc furnace
AT395657B (en) 1990-12-07 1993-02-25 Voest Alpine Ind Anlagen CONTROL CIRCUIT FOR IMPEDANCE CONTROL OF AN ARC FURNACE
US5115447A (en) 1991-01-10 1992-05-19 Ucar Carbon Technology Corporation Arc furnace electrode control
CA2060006A1 (en) 1991-02-08 1992-08-09 Eduard Strebel Process for electrode control of a dc arc furnace, and an electrode control device
US5204872A (en) 1991-04-15 1993-04-20 Milltech-Hoh, Inc. Control system for electric arc furnace
DE4327894A1 (en) 1993-08-19 1995-02-23 Abb Management Ag Method for stabilizing a power grid against fluctuations in reactive load and reactive power compensation device
DE4344854A1 (en) 1993-12-29 1995-07-06 Abb Management Ag Method for regulating the electrodes of a direct current arc furnace and electrode regulating device
US5539768A (en) 1995-03-21 1996-07-23 Ltv Steel Company, Inc. Electric arc furnace electrode consumption analyzer
DE19623540C1 (en) 1996-06-13 1997-12-18 Asea Brown Boveri Method for stabilizing an AC network against fluctuations in reactive power and reactive power compensation device

Also Published As

Publication number Publication date
WO2002028146A1 (en) 2002-04-04
EP1329137B1 (en) 2006-11-29
EP1329137A1 (en) 2003-07-23
ATE347247T1 (en) 2006-12-15
DE50013822D1 (en) 2007-01-11
US6411643B1 (en) 2002-06-25

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