Reduction of storage capacity in DC microgrids using PV-embedded series DC electric springs

Ming Hao Wang, Siew Chong Tan, Shu Yuen Hui

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

9 Citations (Scopus)


In the integration of photovoltaics (PV) with the power grids, battery energy storage systems (BESS) are often adopted to buffer the intermittent solar power. For the PV-battery combination, the capacity of the BESS increases with the scale of PV integration, which increases the cost. In this paper, a PV-embedded series DC electric spring (PVES), which is a new combination of non-critical load, PV, and series DC electric spring (series ES), is proposed as a means for reducing the storage capacity as typically desired in microgrids. A comparison among the BESS, the series ES, and the PVES integrated DC microgrid is provided. Experimental works on a 48 V DC grid with constant and variable load have been performed to verify the storage reduction achievable with the PVES. The results show that the PVES can tackle the intermittency of the solar power with less energy storage capacity.

Original languageEnglish
Title of host publication2016 IEEE Applied Power Electronics Conference and Exposition, APEC 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages8
ISBN (Electronic)9781467383936
Publication statusPublished - 10 May 2016
Event31st Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2016 - Long Beach, United States
Duration: 20 Mar 201624 Mar 2016

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC


Conference31st Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2016
Country/TerritoryUnited States
CityLong Beach


  • DC grids
  • electric springs
  • PV system
  • Smart load
  • storage reduction

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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