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\begin{document}

\title{Transient stability versus damping of electromechanical oscillations in
power systems with embedded multi-terminal VSC-HVDC systems}



\author[1]{Javier Renedo}%
\author[1]{Luis Rouco}%
\author[1]{Aurelio Garcia-Cerrada}%
\author[1]{Lukas Sigrist}%
\affil[1]{Universidad Pontificia Comillas}%


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  \date{May 07, 2024}


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\begin{abstract}
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.%
\end{abstract}%



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\textbf{Hosted file}

\verb`IIT_paper_vsc-mtdc_coordinated_control_ssa_iet_gtd_v13.tex`  available at \url{https://authorea.com/users/518113/articles/592387-transient-stability-versus-damping-of-electromechanical-oscillations-in-power-systems-with-embedded-multi-terminal-vsc-hvdc-systems}

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