FI920820A - FOER FARING EQUIPMENT MAINTENANCE AV EN VAEXELSTROEMSELEKTRODUGNS ELEKTRISKA STORHETER - Google Patents

FOER FARING EQUIPMENT MAINTENANCE AV EN VAEXELSTROEMSELEKTRODUGNS ELEKTRISKA STORHETER Download PDF

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Publication number
FI920820A
FI920820A FI920820A FI920820A FI920820A FI 920820 A FI920820 A FI 920820A FI 920820 A FI920820 A FI 920820A FI 920820 A FI920820 A FI 920820A FI 920820 A FI920820 A FI 920820A
Authority
FI
Finland
Prior art keywords
furnace
estimation
electrode
power
electric
Prior art date
Application number
FI920820A
Other languages
Finnish (fi)
Other versions
FI100740B (en
FI920820A0 (en
Inventor
Lassi Toivonen
Original Assignee
Lassi Toivonen
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
Application filed by Lassi Toivonen filed Critical Lassi Toivonen
Priority to FI920820A priority Critical patent/FI100740B/en
Publication of FI920820A0 publication Critical patent/FI920820A0/en
Priority to AU46727/93A priority patent/AU4672793A/en
Priority to PCT/FI1993/000062 priority patent/WO1993017533A1/en
Priority to ZA931283A priority patent/ZA931283B/en
Publication of FI920820A publication Critical patent/FI920820A/en
Priority to US08/596,693 priority patent/US6058134A/en
Application granted granted Critical
Publication of FI100740B publication Critical patent/FI100740B/en

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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
    • 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

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Discharge Heating (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

This invention relates to a method for measuring the electrode-related electric quantities of an AC electric-arc furnace. The method is based on observing the mutual corrrelation between electrode currents and total power supplied into a furnace by utilizing the fast, natural fluctuation of currents and power supplied into a furnace, and on estimation obervations. The information required in estimation is collected by performing a plurality of successive current and voltage measurements at adjacent instants and at various energy distributions of a furnace. The measurement results are used to calculably determine the estimates for electrode-related voltages, impedances and powers. It is further possible to split the electrode-related powers and voltages on the one hand in the electric-arc power and voltage and on the other hand in the power and voltage loss caused by resistive conduction. The effect of mutual impedances is automatically taken into account in estimation. If desired, the estimation can be performed independently at those frequencies, i.e., at the power system fundamental frequency and at harmonic and interharmonic frequencies which experience a significant transfer of energy. The method is useful in measuring both a furnace with neutral power connection and a furnace without neutral power connection. The measurements can be performed in the primary or secondary of the furnace transformer.
FI920820A 1992-02-25 1992-02-25 A method for measuring the electrical quantities of an AC power supply FI100740B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FI920820A FI100740B (en) 1992-02-25 1992-02-25 A method for measuring the electrical quantities of an AC power supply
AU46727/93A AU4672793A (en) 1992-02-25 1993-02-23 A method for measuring the electric quantities of an AC electric-arc furnace
PCT/FI1993/000062 WO1993017533A1 (en) 1992-02-25 1993-02-23 A method for measuring the electric quantities of an ac electric-arc furnace
ZA931283A ZA931283B (en) 1992-02-25 1993-02-24 A method for measuring the electric quantities of an AC electric-arc furnace
US08/596,693 US6058134A (en) 1992-02-25 1996-02-05 Method for measuring the electric quantities of an AC electric-arc furnace

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI920820 1992-02-25
FI920820A FI100740B (en) 1992-02-25 1992-02-25 A method for measuring the electrical quantities of an AC power supply

Publications (3)

Publication Number Publication Date
FI920820A0 FI920820A0 (en) 1992-02-25
FI920820A true FI920820A (en) 1993-08-26
FI100740B FI100740B (en) 1998-02-13

Family

ID=8534820

Family Applications (1)

Application Number Title Priority Date Filing Date
FI920820A FI100740B (en) 1992-02-25 1992-02-25 A method for measuring the electrical quantities of an AC power supply

Country Status (4)

Country Link
AU (1) AU4672793A (en)
FI (1) FI100740B (en)
WO (1) WO1993017533A1 (en)
ZA (1) ZA931283B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2186678T3 (en) * 1994-02-22 2003-05-16 Wladimir Danilov METHODS AND DEVICES FOR THE MEASUREMENT AND CONTROL OF MASS FLOWS AND CORRELATED MAGNITUDES.
ES2172433B1 (en) * 2000-10-19 2003-06-16 Ferroatlantica Sl MULTI FREQUENCY EQUIPMENT DETECTOR OF THE STATE OF THE ELECTRODES IN THE OVENS OF ARCO ELECTRICO.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4580272A (en) * 1983-06-03 1986-04-01 Outokumpu Oy Method for controlling and balancing the power in an electric furnace

Also Published As

Publication number Publication date
ZA931283B (en) 1993-11-11
WO1993017533A1 (en) 1993-09-02
FI100740B (en) 1998-02-13
FI920820A0 (en) 1992-02-25
AU4672793A (en) 1993-09-13

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