On Per-Phase Topology Control and Switching in Emerging Distribution Systems

Fei Ding, Mirrasoul Mousavi

Research output: Contribution to journalArticlepeer-review

7 Scopus Citations


This paper presents a new concept and approach for topology control and switching in distribution systems by extending the traditional circuit switching to laterals and single-phase loads. Voltage unbalance and other key performance indicators including voltage magnitudes, line loading, and energy losses are used to characterize and demonstrate the technical value of optimizing system topology on a per-phase basis in response to feeder conditions. The near-optimal per-phase topology control is defined as a series of hierarchical optimization problems. The proposed approach is applied to IEEE 13-bus and 123-bus test systems for demonstration, which included the impact of integrating electric vehicles (EVs) in the test circuit. It is concluded that the proposed approach can be effectively leveraged to improve voltage profiles with electric vehicles, the extent of which depends on the performance of the base case without EVs.

Original languageAmerican English
Article number8356095
Pages (from-to)2373-2383
Number of pages11
JournalIEEE Transactions on Power Delivery
Issue number5
StatePublished - 2018

Bibliographical note

Publisher Copyright:
© 2018 IEEE.

NREL Publication Number

  • NREL/JA-5D00-71501


  • electric vehicles
  • load switching
  • network reconfiguration
  • smart charging
  • topology control
  • Voltage unbalance


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