Application of Static Var Compensator of Ultra-High Power Electric Arc Furnace for Voltage Drops Compensation in Factory Power Supply System of Metallurgical Enterprise

Nikolaev, A.A.; Корнилов, Г. П.; Khramshin, Timur R.; Akçay, İsmail Hakkı; Gok, Y.

doi:10.1109/epec.2014.18

Cited by 18 publications

(3 citation statements)

References 4 publications

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“…Previous studies [37,56,57] have shown that transformer characteristics directly affect power consumption. This study proposed the transformer daily efficiency coefficient, which can be calculated using Eq.…”

Section: Influence Of Transformer Daily Efficiency Coefficientmentioning

confidence: 99%

Analysis and optimisation on the energy consumption of electric arc furnace steelmaking

Liu

Wei

Tian

2023

Ironmaking & Steelmaking

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To clarify the influence factors and optimization direction of energy consumption of EAF steelmaking, this study established a complete mass and energy balance model, comprising infiltrated air and offgas flowrate measurement model and radiative and convective heat loss model, to forecast power and oxygen consumption. The influence of power supply, oxygen supply, carbon injection, infiltrated air, and hot metal charging on the power consumption of EAF is discussed. The results show that optimizing production parameters will effectively reduce power consumption, especially improve the infiltrated air flowrate when there are sufficient combustible gases, which is conducive to energy conservation and emission reduction. Additionally, due to the intensive energy and carbon input in the upstream process of hot metal production, the energy consumption and carbon emissions of hot metal charging EAF are much higher than those of 100% scrap charging EAF.

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Section: Influence Of Transformer Daily Efficiency Coefficientmentioning

confidence: 99%

Analysis and optimisation on the energy consumption of electric arc furnace steelmaking

Liu

Wei

Tian

2023

Ironmaking & Steelmaking

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“…Опыт эксплуатации ПЧ-АВ показывает, что система управления АВ не адаптирована к несимметрии питающего напряжения. В [3] показано, что кратковременные несимметричные провалы напряжения глубиной 50 15-50 % и длительностью 100-400 мс приводят к отключению ПЧ-АВ. Аварийные отключения главных приводов прокатных станов приводят к нарушению технологического процесса и значительному экономическому ущербу.…”

Section: авторское резюмеunclassified

Improving of operation stability of frequency converters with active rectifiers in electric steel-making complex electrical equipment switching

2019

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Frequency converters with active rectifiers (FC-AR) are now used in rolling mill electric drives. Modern control systems of ARs are not adapted to voltage sags in power supply systems, which leads to converter tripping. The known methods of ensuring AR operation stability, such as kinetic buffering, correction signals based on negative sequence voltage and others, do not eliminate these emergency trips. As an additional measure the paper proposes the method of voltage sag compensation by using static var compensators (SVC) of electric arc furnaces (EAF) for parallel operation of frequency converters with active rectifiers and electric arc furnaces. However, it remains unknown how disturbances (such as overvoltages of switching of SVC harmonic filters (HF) and voltage sags during furnace transformer switching) affect operation stability of frequency converters with active rectifiers. All this makes it necessary to study the effect of these processes on the operation conditions of FC-AR and to improve the active rectifier control system. The authors used experimental arrays of instantaneous values of voltages and currents of the real-life complex «EAF-SVC» («Electric Arc Furnace – Statistic VAR Compensator») in this study. They also applied mathematical models of FC-AR with different PWM algorithms realized in Matlab-Simulink software. The main assumption of the model consists in using equivalent current sources modelling the operation of autonomous voltage invertors. An improved control system of AR has been developed. The main feature that distinguishes it from the known systems is the fact that it ensures operation stability during SVC harmonic filter and EAF transformer switching by using a signal conditioning unit for setting the active rectifier reactive current component as a function of power supply and AR input voltage difference. Implementation of the improved AR control system improves FC-AR stability during parallel operation with EAFs through reactive power consumption of the supply system. As a result, it reduces the amplitude of inrush current and voltage deviations in the DC-link of the FC-AR to the values lower than the setpoints of the AR protection system.

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“…Кратковре-менные провалы напряжения, которые характе-ризуются длительностью 100-300 мс и глубиной 15-50 % приводят к аварийным отключениям электроприводов и нарушению технологического процесса [3,4]. В [4,5] были предложены меро-приятия по компенсации в сети провалов напря-жения с помощью резервов реактивной мощно-сти статического тиристорного компенсатора (СТК) дуговой сталеплавильной печи (ДСП).…”

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Investigation into parallel operation of rolling mill automated electric drives and an electric arc furnace

Nikolaev¹,

Denisevich²,

Bulanov³

2017

Vestnik IGEU

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Application of Static Var Compensator of Ultra-High Power Electric Arc Furnace for Voltage Drops Compensation in Factory Power Supply System of Metallurgical Enterprise

Cited by 18 publications

References 4 publications

Analysis and optimisation on the energy consumption of electric arc furnace steelmaking

Analysis and optimisation on the energy consumption of electric arc furnace steelmaking

Improving of operation stability of frequency converters with active rectifiers in electric steel-making complex electrical equipment switching

Investigation into parallel operation of rolling mill automated electric drives and an electric arc furnace

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