Lagrange Multiplier-Based Optimization 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

1 Citation (Scopus)

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. On basis of convex optimization theory, the optimal current allocation coefficients of distributed energy resources (DERs) for distribution loss minimization are on-line calculated by Lagrange multiplier method. 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 publication2021 IEEE IAS Industrial and Commercial Power System Asia, I and CPS Asia 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages489-494
Number of pages6
ISBN (Electronic)9781665434980
DOIs
Publication statusPublished - 2 Dec 2021
Event2021 IEEE IAS Industrial and Commercial Power System Asia, I and CPS Asia 2021 - Chengdu, China
Duration: 18 Jul 202121 Jul 2021

Publication series

Name2021 IEEE IAS Industrial and Commercial Power System Asia, I and CPS Asia 2021

Conference

Conference2021 IEEE IAS Industrial and Commercial Power System Asia, I and CPS Asia 2021
Country/TerritoryChina
CityChengdu
Period18/07/2121/07/21

Keywords

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

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

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