Bus selection in multibus DC microgrids

Robert S. Balog, Philip T Krein

Research output: Contribution to journalArticlepeer-review


DC power systems can be made more reliable by using multiple buses for redundancy. Multiple buses provide multiple configuration options for supplying power to the load. Diode ORing with auctioneering diodes is perhaps the most common method to connect a load to multiple buses. Although the diode action is automatic and fault-tolerant, it results in ill-defined bus currents when the bus voltages are similar and the potential for uncontrolled switching in a faulted high-impedance system-operating scenarios not often included in a discussion on auctioneering diodes. Active switching and bus converters with auctioneering diodes are control techniques that overcome these limitations by providing full control over the bus selection process. Using local information in the form of the bus voltage, these techniques do not rely on a centralized controller, which improves system reliability. Dwell time is proposed as a technique to stabilize the state-dependent switching in the bus selector.

Original languageEnglish (US)
Article number5643159
Pages (from-to)860-867
Number of pages8
JournalIEEE Transactions on Power Electronics
Issue number3
StatePublished - May 30 2011


  • Power distribution control
  • power distribution reliability
  • power electronics
  • power systems
  • reconfigurable architectures

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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