Datum
2022-05-23Schlagwort
333 Boden- und Energiewirtschaft HochspannungsgleichstromübertragungDämpfungErneuerbare EnergienElektrizitätsversorgungsnetzWechselstromGleichstromSchwingungNyquist-KriteriumSIMULINKMATLABMetadata
Zur Langanzeige
Aufsatz
Extended Nodal Admittance Matrix Based Stability Analysis of HVDC Connected AC Grids
Zusammenfassung
Motivated by emerging HVDC oscillation issues resulted from the interaction with AC grids, impedance-based stability analysis has become an attractive approach in the de-risking studies due to the capability of black-box modelling and clear physical meaning. However, impedance-based stability assessment of HVDC is typically conducted either from the AC side or from the DC side, without fully considering both AC and DC grid dynamics, thus impairs evaluation accuracy. In this paper, the nodal admittance matrix based resonance mode analysis method is extended to include both AC and DC dynamics through formulating a hybrid AC/DC nodal admittance matrix. In contrast to the widely adopted Nyquist-based methods, the dynamic mode identification and damping ratio extraction using the frequency scanning of modal impedances derived from nodal admittance matrix is more straightforward for stability check, and the eigenvalue-decomposition based participation factor analysis is more useful in analyzing system wide dynamic interaction and identifying oscillation sources, which is in favor of the design of mitigation measures. The effectiveness of the described method is illustrated by case studies using a simple hybrid AC/DC grid consisting of converter-interfaced generation, synchronous machine and HVDC. Stability impacts of the strengths and modelling details of the connected AC grids for HVDC, the switching states of parallel AC line(s) for HVDC, and different modulation modes of HVDC converters are analyzed. It is observed, the AC-DC dynamic coupling can induce the interaction of the AC grids connected in different HVDC terminals. EMT-simulations in MATLAB/Simulink validate the analytical results.
Zitierform
In: IEEE Access Volume 10 (2022-05-23) , S. 55200-55212 ; eissn:2169-3536Förderhinweis
Gefördert durch den Publikationsfonds der Universität KasselZitieren
@article{doi:10.17170/kobra-202208296772,
author={Zhang, Yonggang and Duckwitz, Daniel and Wiese, Nils and Braun, Martin},
title={Extended Nodal Admittance Matrix Based Stability Analysis of HVDC Connected AC Grids},
journal={IEEE Access},
year={2022}
}
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2022-08-29T10:05:47Z 2022-08-29T10:05:47Z 2022-05-23 doi:10.17170/kobra-202208296772 http://hdl.handle.net/123456789/14109 Gefördert durch den Publikationsfonds der Universität Kassel eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ AC-DC dynamic coupling dynamic mode damping ratio HVDC stability assessment 333 Extended Nodal Admittance Matrix Based Stability Analysis of HVDC Connected AC Grids Aufsatz Motivated by emerging HVDC oscillation issues resulted from the interaction with AC grids, impedance-based stability analysis has become an attractive approach in the de-risking studies due to the capability of black-box modelling and clear physical meaning. However, impedance-based stability assessment of HVDC is typically conducted either from the AC side or from the DC side, without fully considering both AC and DC grid dynamics, thus impairs evaluation accuracy. In this paper, the nodal admittance matrix based resonance mode analysis method is extended to include both AC and DC dynamics through formulating a hybrid AC/DC nodal admittance matrix. In contrast to the widely adopted Nyquist-based methods, the dynamic mode identification and damping ratio extraction using the frequency scanning of modal impedances derived from nodal admittance matrix is more straightforward for stability check, and the eigenvalue-decomposition based participation factor analysis is more useful in analyzing system wide dynamic interaction and identifying oscillation sources, which is in favor of the design of mitigation measures. The effectiveness of the described method is illustrated by case studies using a simple hybrid AC/DC grid consisting of converter-interfaced generation, synchronous machine and HVDC. Stability impacts of the strengths and modelling details of the connected AC grids for HVDC, the switching states of parallel AC line(s) for HVDC, and different modulation modes of HVDC converters are analyzed. It is observed, the AC-DC dynamic coupling can induce the interaction of the AC grids connected in different HVDC terminals. EMT-simulations in MATLAB/Simulink validate the analytical results. open access Zhang, Yonggang Duckwitz, Daniel Wiese, Nils Braun, Martin doi:10.1109/ACCESS.2022.3177232 Hochspannungsgleichstromübertragung Dämpfung Erneuerbare Energien Elektrizitätsversorgungsnetz Wechselstrom Gleichstrom Schwingung Nyquist-Kriterium SIMULINK MATLAB publishedVersion eissn:2169-3536 IEEE Access 55200-55212 Volume 10 false
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