Performance Limitations of Distributed Integral Control in Power Networks under Noisy Measurements

Hendrik Flamme, Emma Tegling, Henrik Sandberg

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

6 Citations (SciVal)

Abstract

Distributed approaches to secondary frequency control have become a way to address the need for more flexible control schemes in power networks with increasingly distributed generation. The distributed averaging proportional-integral (DAPI) controller presents one such approach. In this paper, we analyze the transient performance of this controller, and specifically address the question of its performance under noisy frequency measurements. Performance is analyzed in terms of an H2 norm metric that quantifies power losses incurred in the synchronization transient. While previous studies have shown that the DAPI controller performs well, in particular in sparse networks and compared to a centralized averaging PI (CAPI) controller, our results prove that additive measurement noise may have a significant negative impact on its performance and scalability. This impact is shown to decrease with an increased inter-nodal alignment of the controllers' integral states, either through increased gains or increased connectivity. For very large and sparse networks, however, the requirement for inter-nodal alignment is so large that a CAPI approach may be preferable. Overall, our results show that distributed secondary frequency control through DAPI is possible and may perform well also under noisy measurements, but requires careful tuning.

Original languageEnglish
Title of host publication2018 Annual American Control Conference, ACC 2018
PublisherIEEE - Institute of Electrical and Electronics Engineers Inc.
Pages5380-5386
Number of pages7
ISBN (Print)9781538654286
DOIs
Publication statusPublished - 2018 Aug 9
Externally publishedYes
Event2018 Annual American Control Conference, ACC 2018 - Milwauke, United States
Duration: 2018 Jun 272018 Jun 29

Publication series

NameProceedings of the American Control Conference
Volume2018-June
ISSN (Print)0743-1619

Conference

Conference2018 Annual American Control Conference, ACC 2018
Country/TerritoryUnited States
CityMilwauke
Period2018/06/272018/06/29

Bibliographical note

Publisher Copyright:
© 2018 AACC.

Subject classification (UKÄ)

  • Control Engineering

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