Small signal study of grid-forming converters and impact of different control structures and parameters
Benedetti, Luke and Papadopoulos, Panagiotis N. and Egea-Alvarez, Agusti; (2022) Small signal study of grid-forming converters and impact of different control structures and parameters. In: 2022 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe). IEEE, Piscataway, NJ. ISBN 9781665480321 (https://doi.org/10.1109/isgt-europe54678.2022.9960...)
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Abstract
Towards transitioning to a carbon-free power system, new dynamic phenomena and interactions involving grid-forming converters (GFMs) will become important as their proliferation occurs to support this transition. The multi-loop control incorporating inner cascaded voltage and current controllers (VC and CC) often utilised within GFMs are generally expected to cause interactions in higher frequency ranges than the (well-studied) dynamics of interest associated with a purely synchronous machine-based system. However, the restricted control bandwidth associated with low switching frequency of large power rated VSCs results in the need for much slower control time constants, causing potentially destabilizing, lower-frequency (or even non-oscillatory) interactions. This paper offers an extensive insight into the small-signal, multi-machine interactions involving large power rated GFMs in a transmission network: the IEEE 39-bus New-England test system (NETS). Furthering the contribution of this paper, multi-loop controllers are employed within the GFMs, offering an insight into their interactions with other power system elements to help aid the ongoing discussions on model appropriateness and direct AC voltage control versus multi-loop control. Finally, parametric sweep sensitivity analyses are performed for the GFMs which are implemented as virtual synchronous machines (VSMs).
ORCID iDs
Benedetti, Luke, Papadopoulos, Panagiotis N. ORCID: https://orcid.org/0000-0001-7343-2590 and Egea-Alvarez, Agusti ORCID: https://orcid.org/0000-0003-1286-6699;-
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Item type: Book Section ID code: 83935 Dates: DateEvent28 November 2022Published29 July 2022AcceptedSubjects: Technology > Electrical engineering. Electronics Nuclear engineering > Electrical apparatus and materials > Electric networks Department: Faculty of Engineering > Electronic and Electrical Engineering Depositing user: Pure Administrator Date deposited: 31 Jan 2023 11:31 Last modified: 27 Nov 2024 01:31 URI: https://strathprints.strath.ac.uk/id/eprint/83935