Control and modulation of a family of bidirectional AC-DC converters with active power compensation

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

4 Citations (Scopus)


In a single-phase grid-connected nanogrid system, a bidirectional AC-DC converter is usually required to transfer energy between the AC grid and a DC bus. However, a ripple power at twice the grid frequency may be injected from the AC grid into the DC bus if the ripple power is not properly compensated. In this paper, a family of bidirectional single-phase AC-DC three-phase-leg PWM converters for use in the nanogrid system is analyzed. The averaged DC power and the second-order AC power of the AC grid are actively decoupled. A proper AC voltage reference for AC power compensation is analyzed and selected for the charge storage capacitor for better efficiency. A generalized control structure is proposed for the family of converters. Applying modulation with extra zero-sequence voltage injection derived from the three-phase-leg PWM voltages, a significant reduction of the AC storage capacitance is achieved and the converter efficiency is also improved. Finally, the analysis is verified by simulations and experimental measurements.
Original languageEnglish
Title of host publication2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015
Number of pages8
ISBN (Electronic)9781467371506
Publication statusPublished - 27 Oct 2015
Event7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015 - Palais des Congres de Montreal (Montreal Convention Centre), Montreal, Canada
Duration: 20 Sep 201524 Sep 2015


Conference7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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