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Interaction between the voltage-droop and the frequency-droop control for multi-terminal HVDC systems

Abstract : Multi-terminal DC systems must provide a high level of reliability and may have to support the interconnected AC grids. This can be achieved by providing AC/DC converters with a dual controller combining both the voltage-droop and the frequency-droop control techniques. In this article, the coupling between those droops is theoretically investigated and quantified, and a proposed corrected value of the frequency-droop parameter allows the system to comply with the TSO's requirements with regards to the frequency support of the AC grids despite the unintended interaction of the two droops. A dynamic frequency-droop parameter is then proposed to also cope with the controller limits. Finally, an electromagnetic transient study of a five-terminal HVDC grid is performed to validate the theoretical results.
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https://hal-centralesupelec.archives-ouvertes.fr/hal-01423715
Contributor : Jing Dai <>
Submitted on : Saturday, December 31, 2016 - 9:34:30 AM
Last modification on : Wednesday, September 16, 2020 - 5:49:26 PM

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Samy Akkari, Jing Dai, Marc Petit, Xavier Guillaud. Interaction between the voltage-droop and the frequency-droop control for multi-terminal HVDC systems. IET Generation, Transmission and Distribution, Institution of Engineering and Technology, 2016, 10 (6), pp. 1345 - 1352. ⟨10.1049/iet-gtd.2015.0814⟩. ⟨hal-01423715⟩

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