DC electric springs - An emerging technology for DC grids

Kwan Tat Mok, Ming Hao Wang, Siew Chong Tan, Shu Yuen Hui

Research output: Unpublished conference presentation (presented paper, abstract, poster)Conference presentation (not published in journal/proceeding/book)Academic researchpeer-review

27 Citations (Scopus)


There is widespread attention on integrating renewable energy sources, such as the solar power, to DC distributed power systems and DC microgrids. The voltage stability and the power quality issues are of concern if a large proportion of power sources in these DC power systems are generated by intermittent renewable energy sources. This paper presents an electric active suspension technology known as the DC electric springs for stabilizing and improving the quality of the power distributions in DC power grids. The basic operating modes and characteristic of a DC electric spring under different types of serially-connected non-critical loads will first be introduced. Then, various potential issues that affect the power quality of the DC power systems, namely the bus voltage instability, voltage droop, system fault, and harmonics, are briefly addressed. Laboratory-scale experiments validated that the aforementioned quality issues can be mitigated using the proposed DC electric spring technology.

Original languageEnglish
Number of pages7
Publication statusPublished - 8 May 2015
Event30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015 - Charlotte, United States
Duration: 15 Mar 201519 Mar 2015


Conference30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015
Country/TerritoryUnited States


  • DC grids
  • distributed power systems
  • electric springs
  • power electronics
  • smart grid
  • Smart load

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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