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International Journal of Electrical Power and Energy SystemsVolume 108, June 2019, Pages 52-60

Multi – Resonant observer PLL with real-time estimation of grid unbalances(Article)

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  • aUniversity of Novi Sad, Faculty of Technical Sciences, Novi Sad, Serbia
  • bUniversity of Belgrade, School of Electrical Engineering, Belgrade, Serbia

Abstract

In this paper, a novel PLL technique based on Multi-Resonant disturbance Observer (MRO) is investigated. The proposed technique can achieve grid synchronization under distorted voltages and simultaneously quantify grid unbalances, including voltage sags and higher harmonics. Real-time quantification of grid condition is very important in estimating the overall power quality, which in turn has a drastic effect on power regulation. The proposed technique is easily applicable and expandable to any desired number of higher harmonics. In addition, we provide an in-depth analysis of the connection between original grid unbalances in the stationary reference frame and its image under dq transform. Finally, we propose a methodology capable of real-time estimation of positive and negative harmonic sequences based on the observed properties of fundamental and higher harmonics. © 2019 Elsevier Ltd

Author keywords

Higher voltage harmonics estimationMulti-resonant observerPLLPower qualityRST control

Indexed keywords

Engineering controlled terms:Energy policyHarmonic analysisPower qualityQuality control
Engineering uncontrolled termsDistorted voltagesDisturbance observerGrid synchronizationsMulti-resonant observerReal-time estimationReal-time quantificationStationary reference framesVoltage harmonics
Engineering main heading:Phase locked loops

Funding details

Funding sponsor Funding number Acronym
Ministarstvo Prosvete, Nauke i Tehnološkog RazvojaTR-32018,TR-33012,TR-33020MPNTR

  • 1

    This research has been partially funded by Ministry of Science, Education and Technological Development of Republic of Serbia , under grants TR-33012 , TR-32018 (M. R.), TR-33020 (T. B. Š.) and contract No. III 42,004 (M. V., S.G. and E. A.).

  • ISSN: 01420615
  • CODEN: IEPSD
  • Source Type: Journal
  • Original language: English
  • DOI: 10.1016/j.ijepes.2018.12.034
  • Document Type: Article
  • Publisher: Elsevier Ltd

  Vekić, M.; University of Novi Sad, Faculty of Technical Sciences, Trg Dositeja Obradovića 6, Novi Sad, Serbia;
© Copyright 2019 Elsevier B.V., All rights reserved.

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