DC electric springs - A technology for stabilizing DC power distribution systems

Kwan Tat Mok, Ming Hao Wang, Siew Chong Tan, S. Y.Ron Hui

Research output: Journal article publicationJournal articleAcademic researchpeer-review

80 Citations (Scopus)


There is a growing interest in using dc power systems and microgrids for our electricity transmission and distribution, particularly with the increasing penetration of photovoltaic power systems. This paper presents an electric active suspension technology known as the dc electric springs (DC-ES) for voltage stabilization and power quality improvement. The basic operating modes and characteristic of a DC-ES with different types of serially connected non-critical loads will first be introduced. Then, the various power delivery issues of the dc power systems, namely bus voltage variation, voltage droop, system fault, and harmonics, are briefly described. The operating limits of a DC-ES in a dc power grid is studied. It is demonstrated that the aforementioned issues can be mitigated using the proposed DC-ES technology. Experiment results are provided to verify the feasibility of the proposed technology.

Original languageEnglish
Article number7434051
Pages (from-to)1088-1105
Number of pages18
JournalIEEE Transactions on Power Electronics
Issue number2
Publication statusPublished - Feb 2017


  • 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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