Distributed Convex Optimization-Based Control for Distribution Power Loss Minimization of Islanded Three-Phase AC Microgrids

Yajie Jiang, Yun Yang, Siew Chong Tan, Shu Yuen Ron Hui

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

In this paper, the distribution power loss of islanded three-phase AC microgrids comprising both line loss and power converter loss is modelled as a quadratic function of current allocation coefficients, which is a convex function with constraints. Using the on-line convex optimization theory, a distributed gradient descent algorithm is adopted for searching the optimal current allocation coefficients of distributed energy resources (DERs) for distribution loss minimization. By adopting the average reactive power sharing scheme, the proposed control strategy is can obtain the optimal power allocation coefficients for minimizing the distribution power loss of AC microgrids in real time. Then, an improved adaptive droop control strategy is proposed to allocate output active power and reactive power of DERs for achieving the given current-sharing rate. In this way, the real-time efficiency optimization control of AC microgrid can be realized, regardless of line resistance and load variations. The effectiveness of the proposed control strategy is validated by simulation-based case studies.

Original languageEnglish
Title of host publicationProceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages515-520
Number of pages6
ISBN (Electronic)9781728163444
DOIs
Publication statusPublished - 24 May 2021
Event12th IEEE Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021 - Virtual, Singapore, Singapore
Duration: 24 May 202127 May 2021

Publication series

NameProceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021

Conference

Conference12th IEEE Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021
Country/TerritorySingapore
CityVirtual, Singapore
Period24/05/2127/05/21

Keywords

  • AC microgrid
  • Convex optimization
  • distributed energy resource (DER)
  • distribution loss
  • Lagrange multiplier

ASJC Scopus subject areas

  • Control and Optimization
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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