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15-10-2020 | Originalarbeit | Issue 8/2020 Open Access

e & i Elektrotechnik und Informationstechnik 8/2020

Advanced automated emergency control strategy for embedded VSC-HVDC links

Journal:
e & i Elektrotechnik und Informationstechnik > Issue 8/2020
Authors:
Stefan Polster, Herwig Renner, Katrin Friedl, Olof Samuelsson
Important notes
Stefan Polster is a recipient of a DOC Fellowship of the Austrian Academy of Sciences at the Institute of Electrical Power Systems, TU Graz.

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Abstract

This paper proposes an advanced emergency control strategy for embedded VSC-HVDC links after AC disturbances, such as line tripping and generation loss. The control goals are to minimize the impact of the disturbance on the AC-network, which includes improving the long-term voltage stability with utilizing possible unloading capacity of parallel AC elements. The proposed algorithm is evaluated against other control strategies for embedded VSC-HVDC links by applying it to a simple demonstration network. The test system includes all necessary VSC converter dynamics, the VSC-HVDC link current and voltage limits and simple load recovery characteristics for an evaluation of the long term voltage stability. The simulation results are explained and the advantages of the proposed emergency control strategy are discussed.

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Vorwort

CIGRE 2020