Modified Quasi-Z-Source Inverter with Model Predictive Control for Constant Common-Mode Voltage

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

Abstract

The common-mode voltage (CMV) of transformerless inverters in photovoltaic system should be properly addressed. The conventional CMV reduction methods for voltage source inverters should be modified when applied to the quasi-Z-source inverters with shoot-through states. The shoot-through states in a quasi-Z-source inverter may lead to high-frequency harmonics in the CMV, thus inducing severe leakage currents. Hence, this paper analyzes the CMV in the quasi-Z-source inverter. More importantly, a modified quasi-Z-source inverter that can achieve a constant CMV through model predictive control is discussed. Furthermore, redundant switching vectors are added to reduce the computation burden when the model predictive control is adopted. Simulations are presented to validate the CMV reduction methods.
Original languageEnglish
Title of host publicationProceedings of 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia)
Number of pages6
PublisherIEEE Press
Publication dateAug 2019
Pages32-37
Article number8797055
ISBN (Print)978-1-7281-1612-9
ISBN (Electronic)978-89-5708-313-0
Publication statusPublished - Aug 2019
Event2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia) - Busan, Korea, Republic of
Duration: 27 May 201930 May 2019

Conference

Conference2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia)
CountryKorea, Republic of
CityBusan
Period27/05/201930/05/2019
SeriesInternational Conference on Power Electronics
ISSN2150-6078

Keywords

  • Quasi-Z-source
  • Constant common-mode voltage reduction
  • Odd vectors
  • Model predictive control

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    Liu, W., Yang, Y., & Kerekes, T. (2019). Modified Quasi-Z-Source Inverter with Model Predictive Control for Constant Common-Mode Voltage. In Proceedings of 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia) (pp. 32-37). [8797055] IEEE Press. International Conference on Power Electronics https://ieeexplore.ieee.org/document/8797055