Identification of Plasma Arc Model Parameters in an Electric Arc Furnace Plant via Measurement at the Secondary Side of the Transformer

Kolagar, Arash Dehestani; Pahlavani, Mohammad Reza Alizadeh

doi:10.1007/s40031-021-00622-5

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…The basis for its choice is the results of comparing the stress diagrams obtained during the studies on the model with experimental data. According to published diagrams of arc voltages [17,18], the relative value of arc ignition voltage is in the range of 1.24-1.76.…”

Section: Discussion Of the Results Of The Study Of Nonlinear Asymmetric Modes Of The Arc Furnace Power Supply Circuitsmentioning

confidence: 99%

“…For the given curves, the ratio between the voltage of the arc ignition and the voltage of the arc at the moment of its maximum current (relative voltage of the arc ignition) has the following values for the indicated 7 periods: 1.26; 1.27; 1.35; 1.47; 1.59; 1.63 and 1.68. According to the experimental data, during the melting period, this ratio of arc stresses behind the diagrams in [17] is in the range of 1.24-1.76, and for [18] from 1.46 to 1.6. Thus, in terms of the relative arc ignition voltage, all considered the value of the exponent n make it possible to obtain the shape of the arc voltage, the characteristics of which are consistent with the experimental data.…”

Section: Fig 2 Timing Diagrams Of the Current And Voltage Of The Pantegov Arc Model With Different Values Of Nmentioning

confidence: 92%

“…To substantiate the reliability of the reproduction of the arc voltage shape by the considered arc models, the results obtained were compared with the experimental data of the arc voltage functions. The time diagrams of the arc voltage were developed [17], obtained from the measurement data on the secondary winding of the transformer, as well as the experimental data of the arc voltage for a furnace with a transformer power of 60 MVA [18].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Improvement of electromagnetic compatibility and efficiency of power supply circuits of electric arc furnaces in nonlinear asymmetric modes

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AC steel arc furnaces are the most powerful units connected to the electrical grid, the operating mode of which is dynamic, asymmetrical and non-linear. That is why these furnaces cause the entire possible range of negative effects on the quality of electricity in the grid, in particular, fluctuations, asymmetry and non-sinusoidal voltage.Known proposals for improving the electromagnetic compatibility of electric arc furnaces are mainly focused on eliminating the consequences of their negative impact on the power grid.The proposed approach and the corresponding technical solution are aimed at reducing the level of generation of a negative factor and at the same time reduce fluctuations, asymmetry and non-sinusoidal voltage. This result is obtained due to the fact that the proposed solution takes into account the peculiarities of the range of modes natural for arc furnaces. Optimal for such consumers is the use of a constant current power supply system I=const in the range of modes from operational short circuit to maximum load and the system U=const in the whole other range of modes. The implementation of such a system is carried out on the basis of a resonant converter «constant current – constant voltage».Studies have found that the use of such a power supply system, in comparison with the traditional circuit, makes it possible to reduce the non-sinusoidal voltage in a low-power grid from 3.2 % to 2.1 % and the unbalance coefficient from 3.66 to 1.35 %. Previously published data on a significant reduction in voltage fluctuations was also confirmed.The positive effect of such a system on the energy performance of the furnace itself is shown, manifested in an increase in the arc power by 12.5 %, and the electrical efficiency by 5.1 %. This improves the productivity and efficiency of electric arc furnaces

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Section: Discussion Of the Results Of The Study Of Nonlinear Asymmetric Modes Of The Arc Furnace Power Supply Circuitsmentioning

confidence: 99%

Section: Fig 2 Timing Diagrams Of the Current And Voltage Of The Pantegov Arc Model With Different Values Of Nmentioning

confidence: 92%