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Method for identifying the resistance of the active power and workspaces resistively-arc furnace, especially for the production of ferrosilicon
Method for identifying the resistance of the active power and workspaces resistively-arc furnace, especially for the production of ferrosilicon
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机译:识别有功功率和工作区电阻电弧炉特别是硅铁生产中的电阻的方法
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摘要
The object of the invention is the identification of the resistance and power of the active working areas of the resistance-arc furnace, in particular for the production of ferrosilicon, based on measurements of the instantaneous current and phase voltage of the electrode, the determination of the amplitude value, phases of current and successive harmonic constituent phases over a measurement period equal to 20 ms, from which the resistance of the working area is calculated, including the back and the electric arc resistance using alternate schemes,with an electrical arc at the rear and a sub-electric zone at constant values during any period of voltage. The identification of the working areas of the furnace shall be carried out by modelling the electric arc together with the post-electrode zone of the masses melted on a substitution scheme based on the combined parallel two resistances, one of which (r? (t)) models the electric arc zone with the melted-down zone and is variable during each identification period, while the second resistance (Rb) was constant over each power period,models the rear of the electric arc. Modelling the variable resistance characterising the sub-central zone, including the arc, and the alternate fixed resistance of the electric arc-sided masses zone, is determined at the time of reaching the maximum by the replacement resistance of the identified furnace area for each measurement period of voltage and current.
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