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Integrated flicker control for arc furnace

A kind of electric arc furnace, flicker technology, applied in furnace control device, electric furnace heating, furnace and other directions, can solve problems such as voltage fluctuation

Inactive Publication Date: 2019-10-11
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The result is voltage fluctuations visible as flicker

Method used

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  • Integrated flicker control for arc furnace
  • Integrated flicker control for arc furnace

Examples

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Embodiment Construction

[0046] figure 1 An electric arc furnace system 10 is shown, which may be used for melting scrap metal, and which comprises an electric arc furnace 12 and its control equipment 14 .

[0047] The electric arc furnace 12 includes a vessel 16 which can be cooled, for example, with a cooling device 18 . In addition, the electric arc furnace 12 includes one or more electrodes 20 that may be moved within the vessel 16 using hydraulic equipment or an electric drive 22 .

[0048] Electrical energy for heating the interior of vessel 16 (for example for melting scrap metal) is supplied by a transformer 24 interconnected with a converter 26 . Transformer 24 is powered by grid 28 . Typically, the converter 26 can be located on the primary side or on the secondary side of the transformer 24 .

[0049] For example, converter 26 may be a rectifier, and arc furnace 12 may be considered a DC arc furnace. It is also possible that the converter 26 is a chopper, buck converter or other AC to A...

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PUM

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Abstract

A control device (14) for an arc furnace (12) comprises an arc furnace control module (32) for controlling the arc furnace (12) and a flicker module (30) for determining a flicker value (36a, 36b, 36c) in a grid (28) supplying the arc furnace (12), wherein the arc furnace control module (32) is adapted for controlling the arc furnace (12) based on the flicker value (36a, 36b, 36c) and wherein thearc furnace control module (32) and the flicker module (30) are integrated into one structural component (14).

Description

technical field [0001] The invention relates to flicker reduction in electrical grids. In particular, the invention relates to a control device for an electric arc furnace, an electric arc furnace system and a method for controlling an electric arc furnace. Background technique [0002] An electric arc furnace system provides power at an AC or DC voltage to at least one electrode that generates an electric arc for heating the furnace. Typically, in order to optimize the arc furnace process, the power supplied to the electrodes is controlled. For example, the position of the electrodes can be controlled to adjust the voltage (via the length of the arc). In addition, the current through the electrodes can be controlled with a converter. [0003] Heavy load changes to electric arc furnaces can cause disturbances on the grid, from which electricity is drawn. The result is voltage fluctuations visible as flicker. Flicker can be reduced by static var compensation (SVC) connec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B7/144H05B1/02
CPCH05B7/144H05B7/148H05B7/18H05B1/023F27B3/28Y02P10/25F27D11/08F27D19/00F27D2019/0037
Inventor M·舍恩特R·斯塔德勒R·贝奇勒
Owner ABB (SCHWEIZ) AG