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Small-Signal Modelling for In-Depth Modal Analysis of an MTDC System

Abstract : In this paper, the state-space model of a VSC-MTDC system is derived from individual components and a modified PI section model for cables is proposed which considers both core and screen conductors as well as their coupling. A modal analysis performed on the complete system reveals the influence of each component on the system modes and permits the identification of a dominant DC voltage mode. This mode has proved to be largely affected by the energy storage level of the DC grid, and to be predominantly influenced by the voltage-droop parameters of the converters, meaning that the DC voltage dynamic of the MTDC system can be imposed thanks to a judicious choice of the voltage-droop parameters.
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Submitted on : Thursday, December 17, 2015 - 2:34:51 PM
Last modification on : Tuesday, November 22, 2022 - 2:26:15 PM
Long-term archiving on: : Saturday, April 29, 2017 - 3:06:44 PM


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Samy Akkari, Jing Dai, Marc Petit, Pierre Rault, Xavier Guillaud. Small-Signal Modelling for In-Depth Modal Analysis of an MTDC System. 2015 IEEE Electrical Power and Energy Conference (EPEC), Oct 2015, London, Canada. ⟨10.1109/EPEC.2015.7379955⟩. ⟨hal-01244019⟩



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