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Transient stability versus damping of electromechanical oscillations in power systems with embedded multi-terminal VSC-HVDC systems
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  • Javier Renedo,
  • Luis Rouco,
  • Aurelio Garcia-Cerrada,
  • Lukas Sigrist
Javier Renedo
Universidad Pontificia Comillas

Corresponding Author:[email protected]

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Luis Rouco
Universidad Pontificia Comillas
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Aurelio Garcia-Cerrada
Universidad Pontificia Comillas
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Lukas Sigrist
Universidad Pontificia Comillas
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Multi-terminal high-voltage direct current technology based on voltage-source converter stations (VSC-MTDC) is expected to be one of the most important contributors to the future of electric power systems. In fact, among other features, it has already been shown how this technology can contribute to improve transient stability in power systems by the use of supplementary controllers. Along this line, this paper will investigate in detail how these supplementary controllers affect electromechanical oscillations, by means of small-signal stability analysis. The paper analyses two control strategies based on the modulation of active-power injections (P-WAF) and reactive-power injections (Q-WAF) in the VSC stations which were presened in previous work. Both control strategies use global signals of the frequencies of the VSC-MTDC system and they presented significant improvements on transient stability. The paper will provide guidelines for the design of these type of controllers to improve both, large- and small-disturbance angle stability. Small-signal stability analysis (in Matlab) has been compared with non-linear time domain simulation (in PSS/E) to confirm the results using CIGRE Nordic32A benchmark test system with a VSC-MTDC system. The paper analyses the impact of the controller gains and communication latency on electromechanical-oscillation damping. The main conclusion of the paper is that transient-stability-tailored supplementary controllers in VSC-MTDC systems can be tuned to damp inter-area oscillations too, maintaining their effectiveness.
24 Oct 2022Submitted to IET Generation, Transmission & Distribution
26 Oct 2022Submission Checks Completed
26 Oct 2022Assigned to Editor
30 Oct 2022Reviewer(s) Assigned
15 Nov 2022Review(s) Completed, Editorial Evaluation Pending
15 Nov 2022Editorial Decision: Revise Major
12 Feb 20231st Revision Received
14 Feb 2023Submission Checks Completed
14 Feb 2023Assigned to Editor
15 Feb 2023Reviewer(s) Assigned
01 Mar 2023Review(s) Completed, Editorial Evaluation Pending
02 Mar 2023Editorial Decision: Revise Minor
08 Mar 20232nd Revision Received
09 Mar 2023Submission Checks Completed
09 Mar 2023Assigned to Editor
09 Mar 2023Reviewer(s) Assigned
20 Mar 2023Review(s) Completed, Editorial Evaluation Pending
24 Mar 2023Editorial Decision: Revise Minor
17 Apr 20233rd Revision Received
19 Apr 2023Submission Checks Completed
19 Apr 2023Assigned to Editor
20 Apr 2023Reviewer(s) Assigned
10 May 2023Review(s) Completed, Editorial Evaluation Pending
13 May 2023Editorial Decision: Accept