Application of Short-Time Fourier Transform for Harmonic-Based protection of Meshed VSC-MTDC Grids

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Resumé

This work studies the application of short-time Fourier transform (STFT) to extract current harmonics of various fault types to design a protection method for meshed multi-terminal voltage source converter-high-voltage direct current (VSC-HVDC-MTDC) grids. The frequency spectrum of fault current harmonics is used to detect internal and external faults, the faulty pole and fault type. The method does not need the implementation of series inductance on the sides of the DC lines and it is also effective for lines combining overhead lines and cables. The window function and hop size play the primary role in STFT, which are investigated in a sensitivity analysis. A modified version of CIGRE meshed DC grid system is simulated in PSCAD in order to show the robustness of the method, and further signal processing analysis is done in MATLAB. The results show the accurate detection and discrimination between faulty sections using the proposed harmonic-based method and how important the STFT parameters are in order to have a robust protection algorithm.
OriginalsprogEngelsk
TidsskriftThe Journal of Engineering
Vol/bind2019
Udgave nummer16
Sider (fra-til)1439-1443
Antal sider5
ISSN2051-3305
DOI
StatusUdgivet - mar. 2019
Begivenhed14th IET International Conference on AC and DC Power Transmission (ACDC 2018) - Chengdu, Kina
Varighed: 28 jun. 201830 jun. 2018

Konference

Konference14th IET International Conference on AC and DC Power Transmission (ACDC 2018)
LandKina
ByChengdu
Periode28/06/201830/06/2018

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Fourier transforms
Overhead lines
Electric fault currents
Electric potential
Inductance
MATLAB
Sensitivity analysis
Poles
Signal processing
Cables

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title = "Application of Short-Time Fourier Transform for Harmonic-Based protection of Meshed VSC-MTDC Grids",
abstract = "This work studies the application of short-time Fourier transform (STFT) to extract current harmonics of various fault types to design a protection method for meshed multi-terminal voltage source converter-high-voltage direct current (VSC-HVDC-MTDC) grids. The frequency spectrum of fault current harmonics is used to detect internal and external faults, the faulty pole and fault type. The method does not need the implementation of series inductance on the sides of the DC lines and it is also effective for lines combining overhead lines and cables. The window function and hop size play the primary role in STFT, which are investigated in a sensitivity analysis. A modified version of CIGRE meshed DC grid system is simulated in PSCAD in order to show the robustness of the method, and further signal processing analysis is done in MATLAB. The results show the accurate detection and discrimination between faulty sections using the proposed harmonic-based method and how important the STFT parameters are in order to have a robust protection algorithm.",
author = "Mani Ashouri and Silva, {Filipe Miguel Faria da} and Bak, {Claus Leth}",
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Application of Short-Time Fourier Transform for Harmonic-Based protection of Meshed VSC-MTDC Grids. / Ashouri, Mani; Silva, Filipe Miguel Faria da; Bak, Claus Leth.

I: The Journal of Engineering, Bind 2019, Nr. 16, 03.2019, s. 1439-1443.

Publikation: Bidrag til tidsskriftKonferenceartikel i tidsskriftForskningpeer review

TY - GEN

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N2 - This work studies the application of short-time Fourier transform (STFT) to extract current harmonics of various fault types to design a protection method for meshed multi-terminal voltage source converter-high-voltage direct current (VSC-HVDC-MTDC) grids. The frequency spectrum of fault current harmonics is used to detect internal and external faults, the faulty pole and fault type. The method does not need the implementation of series inductance on the sides of the DC lines and it is also effective for lines combining overhead lines and cables. The window function and hop size play the primary role in STFT, which are investigated in a sensitivity analysis. A modified version of CIGRE meshed DC grid system is simulated in PSCAD in order to show the robustness of the method, and further signal processing analysis is done in MATLAB. The results show the accurate detection and discrimination between faulty sections using the proposed harmonic-based method and how important the STFT parameters are in order to have a robust protection algorithm.

AB - This work studies the application of short-time Fourier transform (STFT) to extract current harmonics of various fault types to design a protection method for meshed multi-terminal voltage source converter-high-voltage direct current (VSC-HVDC-MTDC) grids. The frequency spectrum of fault current harmonics is used to detect internal and external faults, the faulty pole and fault type. The method does not need the implementation of series inductance on the sides of the DC lines and it is also effective for lines combining overhead lines and cables. The window function and hop size play the primary role in STFT, which are investigated in a sensitivity analysis. A modified version of CIGRE meshed DC grid system is simulated in PSCAD in order to show the robustness of the method, and further signal processing analysis is done in MATLAB. The results show the accurate detection and discrimination between faulty sections using the proposed harmonic-based method and how important the STFT parameters are in order to have a robust protection algorithm.

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