LAPSE:2023.34097
Published Article
LAPSE:2023.34097
Phasor Estimation of Transient Electrical Signals Composed of Harmonics and Interharmonics
April 24, 2023
Numerical relays have become essential tools for carrying out the protection and surveillance tasks of electrical power systems. These relays implement their functions from the phasors of the electrical network signals, estimated by digital processing using digital filters. Digital filters must meet certain requirements, such as providing a fast and effective response to increasingly complex transient signals made up of components that make the estimation process difficult. In addition to the decreasing exponential (decaying dc offset), harmonics, and signal noise, it must be added that the interharmonic components that in recent years have acquired great relevance, mainly because of the increase in non-linear loads and the extensive use of power electronic systems. The presence of these interharmonic components causes a poor response in most of the filters implemented today. This article presents the design of a new digital filter, C-CharmDF (Cleaned Characteristic Harmonic Digital Filter) for phasor estimation on noisy transient signals with decreasing exponential components, harmonics, and interharmonics. A detailed study was carried out for severe transient situations and stationary signals. It was found that the method can be suitable for relays that implement both fault location functions and system protection functions.
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Keywords
decaying dc offset, digital filter, fault localization, fault signal, harmonics identification, interharmonics identification, noisy signal, signal processing, transient event
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Suggested Citation
Vazquez J, Miñambres JF, Zorrozua MA, Lázaro J. Phasor Estimation of Transient Electrical Signals Composed of Harmonics and Interharmonics. (2023). LAPSE:2023.34097
Author Affiliations
Vazquez J: Department of Electrical Engineering, Faculty of Engineering of Bilbao, University of the Basque Country UPV/EHU, Plaza Ingeniero Torres Quevedo 1, 48013 Bilbao, Spain [ORCID]
Miñambres JF: Department of Electrical Engineering, Faculty of Engineering of Bilbao, University of the Basque Country UPV/EHU, Plaza Ingeniero Torres Quevedo 1, 48013 Bilbao, Spain
Zorrozua MA: Department of Electrical Engineering, Faculty of Engineering of Bilbao, University of the Basque Country UPV/EHU, Plaza Ingeniero Torres Quevedo 1, 48013 Bilbao, Spain
Lázaro J: Department of Applied Mathematics, Faculty of Engineering of Bilbao, University of the Basque Country UPV/EHU, Plaza Ingeniero Torres Quevedo 1, 48013 Bilbao, Spain
Miñambres JF: Department of Electrical Engineering, Faculty of Engineering of Bilbao, University of the Basque Country UPV/EHU, Plaza Ingeniero Torres Quevedo 1, 48013 Bilbao, Spain
Zorrozua MA: Department of Electrical Engineering, Faculty of Engineering of Bilbao, University of the Basque Country UPV/EHU, Plaza Ingeniero Torres Quevedo 1, 48013 Bilbao, Spain
Lázaro J: Department of Applied Mathematics, Faculty of Engineering of Bilbao, University of the Basque Country UPV/EHU, Plaza Ingeniero Torres Quevedo 1, 48013 Bilbao, Spain
Journal Name
Energies
Volume
14
Issue
16
First Page
5166
Year
2021
Publication Date
2021-08-20
Published Version
ISSN
1996-1073
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Original Submission
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PII: en14165166, Publication Type: Journal Article
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LAPSE:2023.34097
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doi:10.3390/en14165166
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Apr 24, 2023
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