Analysis of the influence of the parameters of the power supply network on the operating modes of the electric drives of the stands of the hot rolling mill 1700 of ArcelorMittal Temirtau JSC

I V Breido,V M Druzhinin

doi:10.1088/1757-899x/966/1/012056

I V Breido, V M Druzhinin

Open Access

https://doi.org/10.1088/1757-899x/966/1/012056

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Abstract

The finishing group of stands of the 1700 SRS-1 continuous mill of ArcelorMittal Temirtau JSC is characterized by high rolling speeds and high productivity. The use of DC motors as power sources for the main drives of the stands of high-power thyristor converter units significantly affects the nature of the operating modes of the power supply system and the quality of electricity on the buses of the SRS-1 substation. Experiments were performed to study the electricity grid supply substation in which the basic indexes of quality of electric energy and the built waveform voltage SAG during rolling. Voltage dips are observed throughout the rolling process and reach 10% of the rated network voltage. Due to the complexity of removing individual parameters of electric drives and conducting experiments on a real mill, an adequate model of the electric drive of the stand of the finishing group of the 1700 SRS-1 mill was developed and built.

Highlights

A modern metallurgical rolling mill is a complex set of various mechanisms that are different in purpose and operating modes [1].The continuous broadband hot rolling mill of 1700 sheet rolling shop No 1 (SRS-1) of Arcelor Mittal Temirtau JSC is characterized by high rolling speeds and productivity
In the course of experiments to study the power supply network of substation No 6, from which the main drives of the mill 1700-SRS-1 are supplied with the help of the ‘Resurs-UF’ measuring device, the main indicators of the quality of electric energy are determined and voltage dips during rolling are constructed
Due to the difficulty of taking individual parameters of electric drives and conducting experiments on a real mill, a mathematical simulation model was developed on the example of an electric drive of stand No 6 of the finishing group of the hot rolling mill 1700 SRS-1 of ArcelorMittal Temirtau JSC

Summary

Introduction

The continuous broadband hot rolling mill of 1700 sheet rolling shop No 1 (SRS-1) of Arcelor Mittal Temirtau JSC is characterized by high rolling speeds and productivity. At a high speed of rolling, the metal temperature does not have time to significantly decrease, as a result of which rolling is carried out at a high average temperature, which leads to the required quality of rolled products and an increase in the service life of the work rolls of the stands [2]. A feature of rolling in the finishing group of the mill stands is that it is carried out simultaneously in all stands of the group and the metal passes in one direction while it is crimped in each working stand [3].

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