Frequency scans and resonance mode analysis for resonance problems identification in power networks in presence of harmonic pollution

Eggenschwiler, Loïc (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland) ; Galland, Olga (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland) ; Chollet, Damien (Services Industriels de Lausanne, Lausanne, Switzerland) ; Decorvet, Fabrice (Services Industriels de Genève, Geneva, Switzerland) ; Roggo, Dominique (School of Engineering, HES-SO Valais-Wallis, HEI, HES-SO // University of Applied Sciences Western Switzerland) ; Favre-Perrod, Patrick (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland)

The understanding of harmonics propagation in power systems recently gained interest. In high-voltage (HV) networks, the current trend of undergrounding is modifying the network resonance frequencies. In low-voltage (LV) distribution systems, the increasing deployment of decentralised generation induces new harmonic pollution, which could interfere with power line communications. In this analysis, the most important elements of power systems (overhead lines, underground cables, power transformers, linear loads and inverters) are modelled in frequency and integrated into frequency scan and resonance mode analysis methods. Two network types are analysed to point out the specificities of each network level: the first one is an extra high voltage (EHV)/HV network (380, 220, 125 and 50 kV) and the second one is a part of a medium-voltage/LV distribution system (20 kV and 400 V). With this method, the network behaviour in a large frequency bandwidth (up to 5 kHz for transport grids and up to 200 kHz for the distribution system) can be predicted. Recent network impedance measurements contribute to the validation of this method by showing the same trends and resonance frequencies close to the ones visible in the simulation results.


Article Type:
scientifique
Faculty:
Ingénierie et Architecture
School:
HEIA-FR
HEI-VS
Institute:
Energy - Institut de recherche appliquée en systèmes énergétiques
Institut Systèmes industriels
Date:
2017-10
Pagination:
5 p.
Published in:
CIRED - Open Access Proceedings Journal
Numeration (vol. no.):
2017, no. 1, pp. 650-654
DOI:
ISSN:
2515-0855
Appears in Collection:



 Record created 2021-05-11, last modified 2021-05-28

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