An Improved Modulation Strategy for the Active Voltage Clamping HERIC Inverter

Hui Wang, Zhenxi Wu, Zhongting Tang, Hua Han, Yongheng Yang, Frede Blaabjerg

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

3 Citations (Scopus)

Abstract

The active voltage clamping HERIC (AVC-HERIC) inverter can be employed in PV applications due to its high-performance in terms of low leakage currents, high efficiency, and high power density. However, maintaining a high efficiency and good power quality under reactive power injection requires retrofitting the modulation strategies. This paper thus proposes an improved modulation method for the AVC-HERIC topology. The proposed modulation scheme mainly adopts two operation modes to enable the reactive power injection. Moreover, the two operation modes can be switched according to the polarity of the reference voltage. This maintains the efficiency as when the unipolar pulse width-modulation (PWM) strategy is adopted. Additionally, in the region of the minimum pulse width limitation (MPWL), an effective compensation strategy is also proposed in this paper to improve the power quality. Simulations and experiments are performed on a 4-kW AVC-HERIC system, and the results verify the effectiveness of the proposed modulation.
Original languageEnglish
Title of host publicationProceedings of the IEEE Annual Applied Power Electronics Conference and Exposition (APEC 2019)
Number of pages5
Place of PublicationUSA
PublisherIEEE Press
Publication dateMar 2019
Pages1938-1942
ISBN (Print)978-1-5386-8331-6
ISBN (Electronic)978-1-5386-8330-9
DOIs
Publication statusPublished - Mar 2019
Event34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019 - Anaheim, United States
Duration: 17 Mar 201921 Mar 2019

Conference

Conference34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019
Country/TerritoryUnited States
CityAnaheim
Period17/03/201921/03/2019
SponsorIEEE Industry Applications Society (IAS), IEEE Power Electronics Society (PELS), Power Sources Manufacturers Association (PSMA)
SeriesIEEE Applied Power Electronics Conference and Exposition (APEC)
ISSN2470-6647

Keywords

  • AVC-HERIC
  • Minimum pulse width limitation (MPWL)
  • Power quality
  • Pulse width modulation (PWM)
  • PV systems

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