A Novel Double-Line-Frequency Ripple Suppression Method for Single Phase DC-AC Converter Based on Three-Level Topology

Yanfei Huang, Yan Zhang, Xinying Li, Peng Fang, Jinjun Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

For single-phase DC-AC power conversion, power decoupling is always required due to the existence of double-line-frequency ripple caused by the instantaneous unbalanced power between AC and DC side. The typical power decoupling method utilizes a large electrolytic capacitor and consequently increases the passive components requirement. The active power decoupling scheme introduces an additional low power converter to compensate the ripple, which inevitably increases the system cost and control complexity. To overcome these drawbacks, this paper proposes a novel suppression method based on three-level topology. By optimizing the capacitance design and improved control algorithm, the instantaneous unbalanced power is dynamically redistributed between two series connected intermediate capacitors in order to make the capacitor voltage ripple complementary to each other. Thus the de-link voltage ripple can be reduced to a large extent. Simulation verifies the correctness and effectiveness of the new suppression method.

Original languageEnglish (US)
Title of host publication2018 9th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781538667057
DOIs
StatePublished - Aug 27 2018
Externally publishedYes
Event9th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2018 - Charlotte, United States
Duration: Jun 25 2018Jun 28 2018

Publication series

Name2018 9th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2018

Conference

Conference9th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2018
CountryUnited States
CityCharlotte
Period6/25/186/28/18

Keywords

  • DC-AC Converter
  • Double-line-frequency Ripple Suppression
  • Power Decoupling Method

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