Operation Cost Minimization of Droop-Controlled AC Microgrids Using Multiagent-Based Distributed Control

Chendan Li, Mehdi Savaghebi, Josep M. Guerrero, Ernane A. A. Coelho, Juan Carlos Vasquez Quintero

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Abstract

Recently, microgrids are attracting increasing research interest as promising technologies to integrate renewable energy resources into the distribution system. Although many works have been done on droop control applied to microgrids, they mainly focus on achieving proportional power sharing based on the power rating of the power converters. With various primary source for the distributed generator (DG), factors that are closely related to the operation cost, such as fuel cost of the generators and losses should be taken into account in order to improve the efficiency of the whole system. In this paper, a multiagent-based distributed method is proposed to minimize the operation cost in AC microgrids. In the microgrid, each DG is acting as an agent which regulates the power individually using a novel power regulation method based on frequency scheduling. An optimal power command is obtained through carefully designed consensus algorithm by using sparse communication links only among neighbouring agents. Experimental results for different cases verified that the proposed control strategy can effectively reduce the operation cost.
Original languageEnglish
Article number717
JournalEnergies
Volume9
Issue number9
Number of pages19
ISSN1996-1073
DOIs
Publication statusPublished - Sep 2016

Keywords

  • AC microgrid
  • Multiagent
  • Incremental cost consensus
  • Frequency scheduling
  • Droop control
  • Operation cost minimization
  • Economic dispatch problem (EDP)

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