Asynchronous decentralized method for interconnected electricity markets

Anni Huang, Sung Kwan Joo, Kyung Bin Song, Jin Ho Kim, Kisung Lee

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


This paper presents an asynchronous decentralized method to solve the optimization problem of interconnected electricity markets. The proposed method decomposes the optimization problem of combined electricity markets into individual optimization problems. The impact of neighboring markets' information is included in the objective function of the individual market optimization problem by the standard Lagrangian relaxation method. Most decentralized optimization methods use synchronous models of communication to exchange updated market information among markets during the iterative process. In this paper, however, the solutions of the individual optimization problems are coordinated through an asynchronous communication model until they converge to the global optimal solution of combined markets. Numerical examples are presented to demonstrate the advantages of the proposed asynchronous method over the existing synchronous methods.

Original languageEnglish
Pages (from-to)283-290
Number of pages8
JournalInternational Journal of Electrical Power and Energy Systems
Issue number4
Publication statusPublished - 2008 May


  • Asynchronous communication
  • Decentralized optimization
  • Interregional energy trading
  • Lagrangian relaxation

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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