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http://dx.doi.org/10.18419/opus-12426
Autor(en): | Buchner, Matthias Rudion, Krzysztof |
Titel: | Identification of grid impedance by broadband signals in power systems with high harmonics |
Erscheinungsdatum: | 2021 |
Dokumentart: | Zeitschriftenartikel |
Seiten: | 23 |
Erschienen in: | Energies 14 (2021), No. 7393 |
URI: | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-124452 http://elib.uni-stuttgart.de/handle/11682/12445 http://dx.doi.org/10.18419/opus-12426 |
ISSN: | 1996-1073 |
Zusammenfassung: | Grid impedance is an important parameter and is used to perform impedance-based stability analysis for the operation of grid-connected systems, such as power electronics-interfaced solar, wind and other distributed power generation systems. The identification of grid impedance with the help of broadband signals is a popular method, but its robustness depends strongly on the harmonic disturbances caused by non-linear loads or power electronics. This paper provides an in-depth analysis of how harmonics affect the identification of grid impedance while using broadband measurements. Furthermore, a compensation method is proposed to remove the disturbing influences of harmonics on broadband impedance identification. This method is based on exploiting the properties of the used maximum-length binary sequence (MLBS). To explain the methodology of the proposed method, the design basis for the excitation signal is discussed in detail. The analysis from simulations and a real measurement in an industrial power grid shows the effectiveness of the proposed method in compensating the disturbing influences of harmonics on broadband impedance measurements. |
Enthalten in den Sammlungen: | 05 Fakultät Informatik, Elektrotechnik und Informationstechnik |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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energies-14-07398-v2.pdf | 3,65 MB | Adobe PDF | Öffnen/Anzeigen |
Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons