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Variations in harmonic voltage at the sub-10-minute time scale
Departamento de Ingeniería Electrónica y de Computadores, Universidad de Cordoba, Cordoba, Spain.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0003-4074-9529
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0002-4004-0352
2021 (English)In: Electric power systems research, ISSN 0378-7796, E-ISSN 1873-2046, Vol. 195, article id 107163Article in journal (Refereed) Published
Abstract [en]

This paper presents the statistical analysis of variations in harmonic voltage in the time scale between 1 second and 10 min, a time scale that is rarely considered in studies but that is of relevance for incorrect operation of end-user equipment. The paper also introduces a set of novel power-quality indices quantifying these variations and it gives recommendations on how to include these indices in the power-quality-monitoring framework provided by IEC 61000–4–30. The statistics and the illustration of the novel indices are based on measurements of harmonic 2 through 40 with 1-second time resolution at 154 locations in 16 countries. The proposed power-quality indices are a compromise between storing large amounts of raw data with high time resolution, resulting in the different big-data challenges, and completely neglecting this time scale. Two important findings from this paper are that this time scale should not be completely neglected and that information on this time scale can be recorded without excessive increase in the need for data transmission and storage.

Place, publisher, year, edition, pages
Elsevier, 2021. Vol. 195, article id 107163
Keywords [en]
Electricity distribution grids, Power quality, Power-quality monitoring, Power-system harmonics
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electric Power Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-83308DOI: 10.1016/j.epsr.2021.107163ISI: 000639738600006Scopus ID: 2-s2.0-85102575407OAI: oai:DiVA.org:ltu-83308DiVA, id: diva2:1538275
Note

Validerad;2021;Nivå 2;2021-03-18 (alebob)

Available from: 2021-03-18 Created: 2021-03-18 Last updated: 2023-09-05Bibliographically approved

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Bollen, Math H.J.Rönnberg, Sarah K.

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