Small-Signal Modelling for In-Depth Modal Analysis of an MTDC SystemReport as inadecuate

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* Corresponding author 1 GeePs - Laboratoire Génie électrique et électronique de Paris 2 L2EP - Laboratoire d’Électrotechnique et d’Électronique de Puissance - EA 2697

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.

Keywords : modal analysis MTDC state-space model HVDC

Author: Samy Akkari - Jing Dai - Marc Petit - Pierre Rault - Xavier Guillaud -



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