Harmonics and Flicker in an Iron and Steel Industry with AC arc furnaces M. Pérez-Donsión, S. Jar Pereira, F. T. Oliveira   2019/07/15

Abstract

An AC arc furnace is an unbalanced, non-linear and time-varying load, which can cause many power quality problems to the electric network inside the plant and in its electrical vicinity. Although different studies addressing harmonics and flicker analyses on arc furnaces can be found in the bibliography, it is very difficult obtain an exact model that considers all the parameters that influence the process, and therefore it is necessary to obtain actual measurements under different conditions. This paper presents measurement results for harmonic distortion, flicker and unbalance obtained over three
different measurement campaigns on an iron and steel industry (SNL), as well as the pertinent conclusions. Measurement campaigns were performed on an AC arc furnace of 83 MW (170 TM) with a 120 MVA transformer connected by a ‘dirty’ 220 kV line (55 km) to the Substation of Carregado, where other feeders supply industrial and domestic consumers. Finally, the dynamic
behaviour of an SVC will be analysed and compared to that of a STATCOM by means of simulation studies.

Authors and affiliations

M. Pérez-Donsión(1), S. Jar Pereira(2), F. T. Oliveira(3,4)
1. Department of Electrical Engineering. University of Vigo. Vigo. Spain
2. Industrias Jar. Lalin. Pontevedra. Spain
3. Department of Electrical Engineering, E.S.T.G., Polytechnic Institute of Leiria. Portugal
4. INESC Coimbra (Institute for Systems Engineering and Computers at Coimbra). Portugal

Key words

Flicker, harmonics, power quality, arc furnaces.

References

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Power Delivery, V.19, pp.367-373, 2004.
[2] M.P. Donsión, F. Oliveira. “AC Arc Furnaces Flicker Measurement without and with a SVC System Connected”,
International Conference on Renewable Energy and Power Quality (ICREPQ’07), Sevilla (Spain), March 2007.
[3] Manuel Pérez Donsión, Calidad de la Energía Eléctrica, Ibergarceta Publicaciones, S.L. Madrid 2016. ISBN: 978-84-
1622-858-4
[4] Manuel Pérez Donsión and Santiago Álvarez Lorenzo, Power Quality Measurement. Comparison among three
instruments of measure of different class. Renewable Energy & Power Quality Journal (RE&PQJ), ISSN:2172-038X, 2006
[5] B. Novo, J.L. de Castro y M. P. Donsión, An EMTP Study of Flicker Generation and Transmission in Power Systems due to the Operation of an Electric Arc Furnace, Ninth International Conference on Harmonics and Quality of Power, Orlando, Florida (USA), 2000.
[6] C. Mirra, “Flickermeter. Functional and Design Specifications”, UIE Publication 868, 1986.
[7] Manuel Pérez Donsión and Filipe Oliveira, AC arc furnaces flicker measurement with and without a SVC system connected. Renewable Energy & Power Quality Journal (RE&PQJ), ISSN:2172-038X, 2007.