A Mathematical Model of Electrical Arc Furnaces for Analysis of Electrical Mode Parameters and Synthesis of Controlling Influences

Andriy Lozynskyy,Aldona Kuśmińska-Fijałkowska,Zbigniew Łukasik,Andriy Kutsyk,Lidiia Kasha,Jacek Kozyra,Yaroslav Paranchuk

doi:10.3390/en15051623

Abstract

The synthesis of a real-time model of the electric mode of an arc steelmaking furnace is shown. This model is based on the method of medium-voltage and can be used to analyze the impact of the arc steelmaking furnace on the supply network at different stages of the melting process at different control systems of the electromechanical electrode movement system, and to create model-predictive control systems of electrode movement, when control using hardware in the loop technology. To implement the chosen method, the dynamic arc resistance was used. The last was obtained on the basis of the averaged experimentally taken volt-ampere characteristics of the arc. In paper was proposed its approximation as a current function and arc length. The simulation results obtained using the created model for different operation modes of the arc steelmaking chipboard for a system with a traditional regulator of the electrode movement system are demonstrated.

Highlights

IntroductionPublisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations
We demonstrate the application of this approach on the example of EAF-200
Using the method of medium voltages at the step of numerical integration a mathematical model of the arc power system is developed. Such a model of the arc power system with electromechanical electrode movement system allows one to study transient and steady-state modes taking into account the nonlinearity of the Volt-Ampere characteristics of the arc and load asymmetry

Summary

Introduction

Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Modern high-tech systems, which are increasingly used in industry, place increasing demands on the quality of electricity. The basic requirements for the quality of electricity in modern production are put forward to ensure the appropriate parameters of the supply voltage and harmonic composition of the current. Violation of electricity quality parameters can cause significant losses to the manufacturer both due to violation of the technological mode of production, and due to equipment failure or forced downtime

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