Thermal Analysis of Dry-Type Air-Core Coils for the Optimization of Passive Filtering Systems

Josué Rodríguez D., G. Alonso Orcajo, José M. Cano, Joaquín G. Norniella and Asier Vicente
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Josué Rodríguez D.: Basque Country Research Centre of Arcelor Mittal, 48910 Sestao, Spain
G. Alonso Orcajo: Electrical Engineering Department, University of Oviedo, 33204 Gijón, Spain
José M. Cano: Electrical Engineering Department, University of Oviedo, 33204 Gijón, Spain
Joaquín G. Norniella: Electrical Engineering Department, University of Oviedo, 33204 Gijón, Spain
Asier Vicente: Basque Country Research Centre of Arcelor Mittal, 48910 Sestao, Spain

Energies, 2020, vol. 13, issue 17, 1-24

Abstract: The analysis of harmonic currents in distribution networks of industrial facilities and the associated filtering stages is essential to optimize the production of these installations. Dry-type air-core reactors are one of the main elements of harmonic filter banks. A thermal analysis of these reactors in conventional steel plants and an evaluation of the criteria used to adjust the corresponding thermal protections are proposed in this paper. Accordingly, harmonic currents through the different filter branches are assessed. The proposed methodology builds a thermal magnetic model using the finite element method (FEM) whereby electromagnetic fields, currents and losses are emulated, to allow for recreating the actual coil temperature. The study aims at increasing the reliability of filtering systems by lowering the number of unscheduled shutdowns due to conservative adjustments of thermal protections.

Keywords: dry-type air-core reactor; FEM; filter banks; hot rolling mill; power quality; power system harmonics; steel; thermal protection (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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