Implementable Three-Phase OPF Formulations for MV-LV Distribution Networks: MILP and MIQCP

Luis Gutierrez-Lagos, Michael Z. Liu, Luis F. Ochoa

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

16 Scopus citations

Abstract

The increasing uptake of distributed energy resources (DER) poses significant operational challenges to Distribution Network Operators (DNOs). In this context, AC Optimal Power Flow (OPF)-based approaches have the potential to aid DNOs' decision-making, to enable the operational orchestration of DER and network elements, improving performance while catering for network constraints. However, the classical OPF formulation is non-linear, and consequently, suffers scalability issues when dealing with realistic distribution networks as they can have over thousands of nodes, require three-phase modelling and contain discrete devices. This work extends the authors' previous works by proposing and comparing two implementable OPF formulations (linear and quadratically-constrained) for operational usage in distribution networks considering D-Y transformers. Results using a realistic MV-LV network show that both formulations can successfully orchestrate the operations of DER and network elements. While the linear OPF offers speed advantages when handling discrete variables, the quadratically-constrained OPF has better accuracy with acceptable speeds.

Original languageEnglish
Title of host publication2019 IEEE PES Conference on Innovative Smart Grid Technologies, ISGT Latin America 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538695678
DOIs
StatePublished - Sep 2019
Event2019 IEEE PES Conference on Innovative Smart Grid Technologies, ISGT Latin America 2019 - Gramado, Brazil
Duration: 15 Sep 201918 Sep 2019

Publication series

Name2019 IEEE PES Conference on Innovative Smart Grid Technologies, ISGT Latin America 2019

Conference

Conference2019 IEEE PES Conference on Innovative Smart Grid Technologies, ISGT Latin America 2019
Country/TerritoryBrazil
CityGramado
Period15/09/1918/09/19

Keywords

  • Distribution networks
  • PV systems
  • on-load tap changers
  • optimal power flow
  • scalability

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