Harmonics and Flicker in an Iron and Steel Industry with AC arc furnaces

Pérez-Donsión, M.; Pereira, S. Jar; Oliveira, F.

doi:10.24084/repqj17.329

Cited by 4 publications

(3 citation statements)

References 1 publication

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“…To reduce voltage fluctuations in electrical grids, various types of dynamic compensation for reactive power are traditionally used. Their use, according to experimental data [4], provides a decrease in the short-term dose of flicker from 6.38 % to 3.31 %. The use of a static synchronous compensator (STATCOM) can reduce the short-term flicker index by a factor of 6, provided that the grid impedance and its changes are properly taken into account [5].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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

Turkovskyi

Malinovskyi

Muzychak

et al. 2021

EEJET

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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: Literature Review and Problem Statementmentioning

confidence: 99%

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

Turkovskyi

Malinovskyi

Muzychak

et al. 2021

EEJET

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“…In-depth research on AC EAF has just been carried out in China and abroad in recent years, and the power supply model, power quality emission characteristics, and governance scheme of AC EAF have gradually become mature [7,8]. However, there is relatively little research on DC EAF, and there is still a lack of necessary understanding of the power quality characteristics and effects of large-capacity DC EAF when they are connected to the grid [9].…”

Section: Introductionmentioning

confidence: 99%

Power Performance Analysis of Large Capacity DC Electric Arc Furnace

Xia

2023

J. Phys.: Conf. Ser.

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With the development of iron and steel smelting technology, the application proportion of DC electric arc furnaces will gradually increase in the future. In this paper, the Simulink model is built with reference to the 130-ton DC electric arc furnace produced by ABB ZHONG Shan Transformer Company Limited. In the model, the power performances of the large-capacity DC electric arc furnace are explored by adjusting the trigger angle, DC side arc resistance, and DC reactor values. From the result of the simulation, the power performances of the DC electric arc furnace are mainly affected by the rectifier trigger angle and DC side arc resistance.

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“…519 [21]. Conventionally, to minimize voltage fluctuation, SVC (static var compensator) combined with TCR (thyristor-controlled reactor) and passive tuned filter, or STATCOM combined with PWM inverter module and high-pass filter is used [2,22]. However, depending on the system conditions, a passive filter can be a sufficient solution.…”

Section: Introductionmentioning

confidence: 99%

Harmonic Mitigation Using Passive Harmonic Filters: Case Study in a Steel Mill Power System

Park¹,

Lee

Yoo³

et al. 2021

Energies

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In this study, we mitigated the harmonic voltage in a power system that contained the roughing mill (RM) and finishing mill (FM) motor drives. AC/DC converter type RM drive is a non-linear, large-capacity varying load that adversely affects power quality, e.g., a flicker, voltage distortion, etc. The voltage drop can be compensated within a certain limit by using the proper capacity of a power capacitor bank. In addition, the voltage distortion can be controlled as per the guidelines of IEEE Std. 519 using the passive harmonic filter corresponding to the characteristic harmonics of the motor drive load. The passive harmonic filter can provide an economical solution by mitigating the harmonic distortion with a proper reactive power supply. However, at the planning level, attention should be paid to avoid system overvoltage that is caused by the leading power under light load conditions and also the problem of parallel resonance between the harmonic filter and the step-down transformer. In addition, when designing the filter reactor, the K-factor and peak voltage must be considered; the filter capacitor also requires a dielectric material that considers the harmonic peak voltage. The purpose of this study was to acquire a better understanding of the filter applications as well as verify the field measurement, analysis, and design of harmonic filters together with its performance.

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Harmonics and Flicker in an Iron and Steel Industry with AC arc furnaces

Cited by 4 publications

References 1 publication

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

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

Power Performance Analysis of Large Capacity DC Electric Arc Furnace

Harmonic Mitigation Using Passive Harmonic Filters: Case Study in a Steel Mill Power System

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