Power Quality and Electrical Arc Furnaces

Andrei, Horia; Cepișcă, Costin; Grigorescu, Sorin Dan

doi:10.5772/15996

Cited by 14 publications

(12 citation statements)

References 18 publications

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“…The author [8] has shown that the use of three phase power analyzer for the power quality analysis and the following quantities are important to be measured such as voltage, current, flicker (IEC 68, IEC 61000-4-15-P ST and P LT ), wave shots, THD and harmonics up to the higher orders .In different stages of operation of electrical arc furnace, the TDD-I vary between 1% -21% for the current and 1% -6% for the THD-V. Comparing the value with the international standard, it is observed that the arc furnace does not match with either national or international standard.…”

Section: Review Of Harmonic Generated By Eaf In Power Systemmentioning

confidence: 99%

Harmonics generated by Electric Arc Furnace in Electric Power System - A Review

Srivastava¹,

Singh²

2019

SMSJ

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An electrical power system is designed to operate at the frequency of 50 Hz or 60 Hz. But there are certain loads which generate voltage and current that are the integer multiple of 50 or 60 Hz. Those higher frequencies form electrical network pollution called as power system harmonics. An Electric Arc Furnace (EAF) is one of such load when operated on AC affects the power quality of the power system. The power quality is degraded mainly due to the poor power factor, current and voltage harmonics and voltage fluctuation. The problems due the harmonics is getting worsen day by day due to the introduction of power electronics equipments and voltage fluctuation arise by the use of large industrial load such as EAFs and LMF (Ladle Melt Furnace) in steel meting shop. Also connecting rolling mill and forging shop generate harmonics in the adjacent electrical power system. In this paper, an extensive review of harmonics generated in EAF is presented .

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Section: Review Of Harmonic Generated By Eaf In Power Systemmentioning

confidence: 99%

Harmonics generated by Electric Arc Furnace in Electric Power System - A Review

Srivastava¹,

Singh²

2019

SMSJ

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“…Only 32% of the steel factory in the world used the EAF due to its expensive cost compared to the traditional furnaces. The EAF is composed of three parts, the shell which includes walls and lower bowl, the main part and the roof part which is well insulated or water cooled [3].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Heat Transfer Water-Cooled Roof in an Electric Arc Furnace

Assad

Khanafer

Hani

et al. 2021

Journal of Thermal Engineering

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One of the major problems in electric arc furnace is the high temperature which results in thermal stresses and cracks within the material of the furnace surrounding walls. An effective cooling technique is needed to avoid such problems. For this purpose, a novel roof configuration of an electric arc furnace is used to provide efficient cooling to reduce the temperature in the roof material. The roof consists of two solid materials, namely, copper and alumina brick. The roof cooling is achieved by a water circulation within the roof. A numerical model using finite element method was implemented to solve the heat conduction equation with the complicated boundary conditions to find out the effects of using brick material with geometrical size variations for different values of thermal conductivity on the temperature distribution within the roof. The results showed that the decrease in brick material thermal conductivity resulted in a significant decrease in the top surface temperature of the furnace roof. The results showed that rectangular brick material is the best option in the roof to keep it at low temperature.

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“…A step-down transformer is normally adopted for feeding the electrodes, usually characterized by significant series impedance, which helps arc stability, provides current limitation and mitigates grid current harmonics. This solution is very robust, but suffers from several issues, especially the "pollution" of the electrical grid [1] (e.g. flicker, harmonics) and low Power Factor (PF), which require oversizing the power distribution system.…”

Section: Introductionmentioning

confidence: 99%

“…Simulation investigation, optimization and validation prior to implementation of control algorithms have been performed by reproducing the overall digital control architecture and power electronic converters, including communication constraints among different modules and controllers. Both a complete analytical model from literature on gas discharge [1], and a novel empirical one, based on measurements from an actual plant, have been used for modeling the arc voltage/current relation. Finally, experimental results will be presented for an actual EAF plant.…”

Section: Introductionmentioning

confidence: 99%

Digital Current Control of Electric Arc Furnace by Parallel Modular Three-Phase IGBT Inverters

Calligaro

Petrella

2019

2019 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Electric Arc Furnaces (EAF) have been traditionally fed by means of a medium-to low-voltage transformer (between grid and electrodes), where the main control action consists of modifying the electrodes vertical position. This simple and robust arrangement suffers from grid "pollution" and poor current control. Current control of EAF by means of three phase modular inverters is reported here for the first time. Several control issues are analyzed and addressed, ranging from pure control (e.g. addressing load imbalance and limits due to low switching frequency) to system management. Two different current regulation methods are proposed and compared, namely a scalar approach and a vector method using "quasi-zero phase-lag" sampling and gains adaptation. The second technique achieves very good control, leading to lower oversizing of the converter stage and process optimization. Simulations have been performed including digital controller architecture, converters and arc electrical behavior. Preliminary experimental measurements are reported based on an actual plant.

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Power Quality and Electrical Arc Furnaces

Cited by 14 publications

References 18 publications

Harmonics generated by Electric Arc Furnace in Electric Power System - A Review

Harmonics generated by Electric Arc Furnace in Electric Power System - A Review

Numerical Investigation of Heat Transfer Water-Cooled Roof in an Electric Arc Furnace

Digital Current Control of Electric Arc Furnace by Parallel Modular Three-Phase IGBT Inverters

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