Coherence in synchronizing power networks with distributed integral control

Martin Andreasson; Emma Tegling; Henrik Sandberg; Karl H. Johansson

doi:10.1109/CDC.2017.8264613

Coherence in synchronizing power networks with distributed integral control

Martin Andreasson, Emma Tegling, Henrik Sandberg, Karl H. Johansson

KTH Royal Institute of Technology

Forskningsoutput: Kapitel i bok/rapport/Conference proceeding › Konferenspaper i proceeding › Peer review

Sammanfattning

We consider frequency control of synchronous generator networks and study transient performance under both primary and secondary frequency control. We model random step changes in power loads and evaluate performance in terms of expected deviations from a synchronous frequency over the synchronization transient; what can be thought of as lack of frequency coherence. We compare a standard droop control strategy to two secondary proportional integral (PI) controllers: centralized averaging PI control (CAPI) and distributed averaging PI control (DAPI). We show that the performance of a power system with DAPI control is always superior to that of a CAPI controlled system, which in turn has the same transient performance as standard droop control. Furthermore, for a large class of network graphs, performance scales unfavorably with network size with CAPI and droop control, which is not the case with DAPI control. We discuss optimal tuning of the DAPI controller and describe how inter-nodal alignment of the integral states affects performance. Our results are demonstrated through simulations of the Nordic power grid.

Originalspråk	engelska
Titel på värdpublikation	2017 IEEE 56th Annual Conference on Decision and Control, CDC 2017
Förlag	IEEE - Institute of Electrical and Electronics Engineers Inc.
Sidor	6327-6333
Antal sidor	7
ISBN (elektroniskt)	9781509028733
DOI	https://doi.org/10.1109/CDC.2017.8264613
Status	Published - 2018 jan. 18
Externt publicerad	Ja
Evenemang	56th IEEE Annual Conference on Decision and Control, CDC 2017 - Melbourne, Australien Varaktighet: 2017 dec. 12 → 2017 dec. 15 Konferensnummer: 56 http://cdc2017.ieeecss.org/

Publikationsserier

Namn	2017 IEEE 56th Annual Conference on Decision and Control, CDC 2017
Volym	2018-January

Konferens

Konferens	56th IEEE Annual Conference on Decision and Control, CDC 2017
Förkortad titel	CDC 2017
Land/Territorium	Australien
Ort	Melbourne
Period	2017/12/12 → 2017/12/15
Internetadress	http://cdc2017.ieeecss.org/

Bibliografisk information

Funding Information:
M. Andreasson, deceased, was with the School of Electrical Engineering and the ACCESS Linnaeus Centre, KTH Royal Institute of Technology, Stockholm, Sweden. He sadly passed away after the completion of this work. E. Tegling, H. Sandberg and K.H. Johansson are with the same organization. Corresponding author: E. Tegling ([email protected]) This work was supported in part by the European Commission, the Knut and Alice Wallenberg Foundation, by the Swedish Research Council through grants 2014-6282 and 2013-5523, and by the Swedish Foundation for Strategic Research.

Publisher Copyright:
© 2017 IEEE.

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Andreasson, M., Tegling, E., Sandberg, H., & Johansson, K. H. (2018). Coherence in synchronizing power networks with distributed integral control. I 2017 IEEE 56th Annual Conference on Decision and Control, CDC 2017 (s. 6327-6333). (2017 IEEE 56th Annual Conference on Decision and Control, CDC 2017; Vol. 2018-January). IEEE - Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CDC.2017.8264613

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abstract = "We consider frequency control of synchronous generator networks and study transient performance under both primary and secondary frequency control. We model random step changes in power loads and evaluate performance in terms of expected deviations from a synchronous frequency over the synchronization transient; what can be thought of as lack of frequency coherence. We compare a standard droop control strategy to two secondary proportional integral (PI) controllers: centralized averaging PI control (CAPI) and distributed averaging PI control (DAPI). We show that the performance of a power system with DAPI control is always superior to that of a CAPI controlled system, which in turn has the same transient performance as standard droop control. Furthermore, for a large class of network graphs, performance scales unfavorably with network size with CAPI and droop control, which is not the case with DAPI control. We discuss optimal tuning of the DAPI controller and describe how inter-nodal alignment of the integral states affects performance. Our results are demonstrated through simulations of the Nordic power grid.",

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Andreasson, M, Tegling, E, Sandberg, H & Johansson, KH 2018, Coherence in synchronizing power networks with distributed integral control. i 2017 IEEE 56th Annual Conference on Decision and Control, CDC 2017. 2017 IEEE 56th Annual Conference on Decision and Control, CDC 2017, vol. 2018-January, IEEE - Institute of Electrical and Electronics Engineers Inc., s. 6327-6333, 56th IEEE Annual Conference on Decision and Control, CDC 2017, Melbourne, Australien, 2017/12/12. https://doi.org/10.1109/CDC.2017.8264613

Coherence in synchronizing power networks with distributed integral control. / Andreasson, Martin; Tegling, Emma; Sandberg, Henrik et al.
2017 IEEE 56th Annual Conference on Decision and Control, CDC 2017. IEEE - Institute of Electrical and Electronics Engineers Inc., 2018. s. 6327-6333 (2017 IEEE 56th Annual Conference on Decision and Control, CDC 2017; Vol. 2018-January).

Forskningsoutput: Kapitel i bok/rapport/Conference proceeding › Konferenspaper i proceeding › Peer review

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Andreasson M, Tegling E, Sandberg H, Johansson KH. Coherence in synchronizing power networks with distributed integral control. I 2017 IEEE 56th Annual Conference on Decision and Control, CDC 2017. IEEE - Institute of Electrical and Electronics Engineers Inc. 2018. s. 6327-6333. (2017 IEEE 56th Annual Conference on Decision and Control, CDC 2017). doi: 10.1109/CDC.2017.8264613

Coherence in synchronizing power networks with distributed integral control

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