Analysis, control and design of a long-lifetime AC-DC bus converter within a nanogrid

Hao Wu, Siu Chung Wong, Chi Kong Tse, Qianhong Chen

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

5 Citations (Scopus)


In an AC-DC hybrid bus nanogrid, a bidirectional converter is commonly used to transfer energy between the single-phase AC system and the DC system with stable operation and long lifetime. Therefore, the single-phase AC-DC converter should be designed to avoid using the short lifetime electrolytic capacitor. In this paper, a bidirectional single-phase AC-DC PWM converter using an additional line-level AC storage capacitor as the AC-DC power balancing device is proposed. A condition for zero ripple DC bus voltage is established such that a small DC bus capacitor can be used. Both the AC-DC power balancing and DC bus filtering capacitors can be designed small without using electrolytic capacitor in order to extend the converter lifetime. A control strategy that minimizes the size of capacitance is proposed, analyzed and verified. Finally, the analysis is verified by numerical simulations and experimental measurements.
Original languageEnglish
Title of host publicationConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
Publication statusPublished - 1 Jan 2015
Event30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015 - Charlotte Convention Center, Charlotte, United States
Duration: 15 Mar 201519 Mar 2015


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

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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