Multi-point method using effective demodulation and decomposition techniques allowing identification of disturbing loads in power grids

Piotr Kuwałek; Grzegorz Wiczyński

doi:10.1016/j.epsr.2024.110335

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Title

Multi-point method using effective demodulation and decomposition techniques allowing identification of disturbing loads in power grids

Authors

Piotr Kuwałek (WARiE) ^{[ 1 ][ 2.2 ][ P ]}
Grzegorz Wiczyński (WARiE) ^{[ 1 ][ 2.2 ][ P ]}

^{[ 1 ]} Instytut Elektrotechniki i Elektroniki Przemysłowej, Wydział Automatyki, Robotyki i Elektrotechniki, Politechnika Poznańska | ^{[ P ]} employee

Scientific discipline (Law 2.0)

[2.2] Automation, electronics, electrical engineering and space technology

Year of publication

2024

Published in

Electric Power Systems Research

Journal year: 2024 | Journal volume: vol. 231

Article type

scientific article

Publication language

english

Keywords

EN

Demodulation
Disturbing loads
Flicker
Identification
Localization
Power quality
Voltage fluctuation
Voltage variation

Abstract

EN The paper presents an innovative approach to identifying voltage fluctuation sources in power networks, also considering the localization understood as the indication of supply points of disturbing loads. The presented approach considers disturbance sources that change their operating state with a frequency higher than the power frequency. The implementation of the proposed solution is also proposed in such a way that its implementation in the smart meter infrastructure allows automatic localization of disturbance sources without additional expert knowledge. In the proposed approach, the modulation signal is estimated using a carrier signal estimator, which allows the estimation of a modulation signal with a frequency higher than the power frequency. The estimated modulating signal is decomposed into component signals associated with individual disturbing loads by decomposition by approximation using pulse waves. The decomposition process allows for the estimation of selected parameters associated with disturbing loads, on the basis of which the assessment of propagation of voltage fluctuations associated with the impact of individual disturbance sources is performed, which allows for the indication of their supply point. The proposed approach was verified in numerical simulation studies using MATLAB/SIMULINK and in experimental studies carried out in a real low-voltage power grid.

Date of online publication

21.03.2024

Pages (from - to)

110335-1 - 110335-9

DOI

10.1016/j.epsr.2024.110335

URL

https://www.sciencedirect.com/science/article/pii/S0378779624002232?via%3Dihub

Comments

Article number: 110335

License type

CC BY (attribution alone)