Abstract
A strategic use of a static synchronous compensator (STATCOM) for providing dynamic reactive power management of a hot rolling mill plant along with active mitigation of harmonics is considered in this article. More specifically, the behavior of a cascaded H-bridge (CHB) converter-based STATCOM is assessed. The impact of the steel to be milled and the specific features of the plant on the design of the STATCOM is discussed. The proposed strategy is analyzed from the point of view of reactive power flow management, active power loss reduction, and voltage control at the coupling point, as well as harmonics reduction and decrease of unscheduled shutdowns in the event of a trip in the passive filtering system. The article is based on real plant measurements, simulation tests, and results from an experimental platform built at scale, and represents the first stage of an ambitious plan to renew this type of plants aimed at transforming them into active elements for electrical energy management.
Highlights
S TEEL industry is considered to be an energy-intensive industry [1]
These facilities are constituted by rolling stands comprising cycloconverters of 12 or more pulses and passive filtering systems for compensating reactive power and canceling harmonics [2]–[4]
The analytical procedure for obtaining the load profiles of each of the rolling cylinders as well as the active and reactive power profiles has been described in detail in previous work [17], [18].Simulation programs to predict the properties of hot strip steels from the rolling conditions, e.g., Stripcam or HSMM, must be used
Summary
S TEEL industry is considered to be an energy-intensive industry [1]. Efficient use of energy plays a strategic role in steel industry, which is the industrial sector with the highest energy demand in numerous countries. This article seeks to develop a procedure to improve a great number of hot rolling mill plants based on classic topologies, which are predominant in facilities launched in the 90 s and currently still in service. These facilities are constituted by rolling stands comprising cycloconverters of 12 or more pulses and passive filtering systems for compensating reactive power and canceling harmonics [2]–[4]. The final target is aimed at offering solutions for the increasingly high demand of efficiency and active management of energy in energy-intensive industries
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