Centralized Unbalanced Dispatch of Smart Distribution DC Microgrid Systems

Tianqi Hong, Francisco De Leon

Research output: Contribution to journalArticlepeer-review


This paper proposes three new operation strategies such that a set of dc microgrids in distribution systems can cooperate pursuing particular objectives: 1) loss reduction; 2) full unbalance compensation; and 3) partial unbalance compensation. Loss reduction is a regular strategy for distribution utilities operating their systems efficiently by optimal dispatch of three-phase in/out powers of dc microgrids. Full and partial unbalance compensation strategies can solve single-or two-phase overloading problems of substation transformers temporarily and slow down their aging process. To validate the performance of the proposed operation strategies, several steady-state studies are performed in the IEEE 123-bus test system. According to the simulation results, the operation losses can be reduced by up to 34% with 15.2% DG penetration. The maximum single-phase loading of the substation transformer can be reduced by up to 30%.

Original languageEnglish (US)
Pages (from-to)2852-2861
Number of pages10
JournalIEEE Transactions on Smart Grid
Issue number4
StatePublished - Jul 2018


  • Centralized operation
  • dc microgrid
  • distribution systems
  • load balancing
  • smart distribution

ASJC Scopus subject areas

  • General Computer Science


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