Unified Digital Periodic Signal Filters for Power Converter Systems

Yongheng Yang, Zhen Xin, Keliang Zhou, Frede Blaabjerg

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

2 Citations (Scopus)

Abstract

Periodic signal controllers like repetitive and resonant controllers have demonstrated much potential in the control of power electronic converters, where periodic signals (e.g., ac voltages and currents) can be precisely regulated to follow references. Beyond the control of periodic signals, ac signal processing (e.g., in synchronization and pre-filtering) is also very important for power converter systems. Hence, this paper serves to unify digital periodic signal filters so as to maximize their roles in power converter systems (e.g., enhance the control of ac signals). The unified digital periodic signal filters behave like a comb filter, but it can also be configured to selectively filter out the harmonics of interest (e.g., the odd-order harmonics in single-phase power converter systems). Moreover, a virtual variable-sampling-frequency unit delay that enables frequency adaptive periodic signal filters is introduced, which can enhance the filtering performance even under non-nominal conditions. Case studies on a digital synchronization system and also a single-phase photovoltaic system have demonstrated the effectiveness of the unified digital periodic signal filters.
Original languageEnglish
Title of host publicationProceedings of the 2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia)
Number of pages6
PublisherIEEE Press
Publication dateJun 2017
Pages286-291
ISBN (Print)978-1-5090-5156-4
DOIs
Publication statusPublished - Jun 2017
Event2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia) - Kaohsiung, Taiwan, Province of China
Duration: 3 Jun 20177 Jun 2017

Conference

Conference2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia)
CountryTaiwan, Province of China
CityKaohsiung
Period03/06/201707/06/2017

Keywords

  • Harmonics
  • Digital periodic signal controllers
  • Repetitive controller
  • Resonant controller
  • Digital filters
  • Notch filter
  • Comb filter
  • Frequency adaptive
  • Power quality
  • Power converter systems

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    Yang, Y., Xin, Z., Zhou, K., & Blaabjerg, F. (2017). Unified Digital Periodic Signal Filters for Power Converter Systems. In Proceedings of the 2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia) (pp. 286-291). IEEE Press. https://doi.org/10.1109/IFEEC.2017.7992052