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Improving performance of droop-controlled microgrids through distributed PI-control
KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.ORCID-id: 0000-0001-8975-1801
KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.
KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.ORCID-id: 0000-0003-1835-2963
2016 (engelsk)Inngår i: 2016 AMERICAN CONTROL CONFERENCE (ACC), IEEE conference proceedings, 2016, s. 2321-2327Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

This paper investigates transient performance of inverter-based microgrids in terms of the resistive power losses incurred in regulating frequency under persistent stochastic disturbances. We model the inverters as second-order oscillators and compare two algorithms for frequency regulation: the standard frequency droop controller and a distributed proportional-integral (PI) controller. The transient power losses can be quantified using an input-output H-2 norm. We show that the distributed PI-controller, which has previously been proposed for secondary frequency control (the elimination of static errors), also has the potential to significantly improve performance by reducing transient power losses. This loss reduction is shown to be larger in a loosely interconnected network than in a highly interconnected one, whereas losses do not depend on connectivity if standard droop control is employed. Moreover, our results indicate that there is an optimal tuning of the distributed PI-controller for loss reduction. Overall, our results provide an additional argument in favor of distributed algorithms for secondary frequency control in microgrids.

sted, utgiver, år, opplag, sider
IEEE conference proceedings, 2016. s. 2321-2327
Serie
Proceedings of the American Control Conference, ISSN 0743-1619
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-204147DOI: 10.1109/ACC.2016.7525264ISI: 000388376102062Scopus ID: 2-s2.0-8499212861ISBN: 978-1-4673-8682-1 (tryckt)OAI: oai:DiVA.org:kth-204147DiVA, id: diva2:1084802
Konferanse
American Control Conference (ACC), JUL 06-08, 2016, Boston, MA
Merknad

QC 20170327

Tilgjengelig fra: 2017-03-27 Laget: 2017-03-27 Sist oppdatert: 2017-03-27bibliografisk kontrollert

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