Development of an Improved Method for Selecting the Power of a Static Var Compensator for Electric Arc Furnaces

Nikolaev, A.A.

doi:10.18503/1995-2732-2017-15-3-74-94

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the active phase of the charge melting, the voltage at the connection point of the furnace transformer, along with the arc power proportional to the square of the voltage, is decreased by 10% or more and not less than 19%, respectively. Therefore, almost all contemporary extra-power EAF are equipped and operated with STC [23][24][25] for voltage stabilization and maintenance of the EAF production rate:…”

Section: Electromagnetic Compatibility and Reactive Power Compensationmentioning

confidence: 99%

Power Supply at Metallurgical Iron-and-Steel Works: Features and Development Prospects

et al. 2021

View full text Add to dashboard Cite

The article provides a brief assessment of the current state of power supply units at metallurgical plants and prospects for their future development. The principal power-supply problems of at metallurgical enterprises having their own generation of electric energy are briefly outlined. Inherent possibilities for increasing the stability and efficient operation of electrical equipment in metallurgical units are analyzed. Topical issues concerning reactive power compensation and the need to ensure electromagnetic compatibility of powerful nonlinear loads, including electric arc furnaces and rolling mills, are highlighted.

show abstract

Section: Electromagnetic Compatibility and Reactive Power Compensationmentioning

confidence: 99%

Power Supply at Metallurgical Iron-and-Steel Works: Features and Development Prospects

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Electric arc furnaces are characterized in certain periods of melting by a significantly asymmetric load and, according to experimental data [19], the field of expected values of negative sequence currents is within 15-30 %. This indicates a significant level of mode asymmetry.…”

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

View full text Add to dashboard Cite

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

show abstract

“…A great number of papers of both Russian and foreign scientists are concerned with mathematical modeling of electric circuits [4][5][6][7]. They consider different approaches to mathematical descriptions of high current electric arcs and analyze the ways of appropriate simulation of random disturbances and asymmetrical conditions in electric arc furnaces.…”

Section: Introductionmentioning

confidence: 99%

Research and Development of Automatic Control System for Electric Arc Furnace Electrode Positioning

Николаев

Povelitsa

Корнилов³

et al. 2015

AMM

View full text Add to dashboard Cite

The article is concerned with the advanced automatic control system of electrode positioning at electric arc steel making furnaces and ladle furnaces. Analysis of structure of modern electrode positioning control systems’ nonlinear controllers for electric arc furnaces and ladle furnaces is considered. Disadvantages of these systems were analyzed. A control system with a conventional structure from well-established foreign suppliers was compared with the advanced automatic control system of electrode positioning.

show abstract

Development of an Improved Method for Selecting the Power of a Static Var Compensator for Electric Arc Furnaces

Cited by 3 publications

References 0 publications

Power Supply at Metallurgical Iron-and-Steel Works: Features and Development Prospects

Power Supply at Metallurgical Iron-and-Steel Works: Features and Development Prospects

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

Research and Development of Automatic Control System for Electric Arc Furnace Electrode Positioning

Contact Info

Product

Resources

About