From Voltage Stiff to Voltage Weak DC Distribution Grid: Opportunities and Challenges

Tsegay Hailu, Laurens Mackay, Mladen Gajic, J. A. Ferreira

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

8 Citations (Scopus)


This paper reviews the currently available dc micro-grids and dc grids. Currently, commonly existing and proposed dc microgrids are designed to provide sufficeint energy during system disturbance as in ac grid and, are mainly voltage stiff systems. It also compares the voltage stiff systems to a low energy system, which represents voltage weak dc system, from systems point of view. First, the definition of voltage weak dc systems is provided from a system perspective. Comparisons of both dc systems are reviewed on stability complexity, fault detection and isolation strategies and devices, and power management approaches. Various challenges and opportunities of voltage weak dc systems are briefly addressed. And also several architectures and topologies for voltage weak dc distribution systems are reviewed. Finally, this paper identifies a comparative advantage of such systems from a control, protection and system operation standpoints.

Original languageEnglish
Title of host publication2016 IEEE 2nd Annual Southern Power Electronics Conference, SPEC 2016
Place of PublicationPiscataway, NJ
Number of pages6
ISBN (Electronic)978-1-5090-1546-7
Publication statusPublished - 2017
EventIEEE SPEC 2016: 2nd Annual Southern Power Electronics Conference - Auckland, New Zealand
Duration: 5 Dec 20168 Dec 2016
Conference number: 2


ConferenceIEEE SPEC 2016
Country/TerritoryNew Zealand


  • Microgrids
  • Capacitance
  • Voltage control
  • Stability analysis
  • Capacitors
  • Power system stability

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