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YAN Zhaoyang,KANG Ming,SONG Xuewei,WEI Bing'ang,DAI Huiwen.Single-phase Current-source High-frequency-link Matrix PET and De-recoupling Modulation[J].JOURNAL OF POWER SUPPLY,2019,17(5):11-21
Single-phase Current-source High-frequency-link Matrix PET and De-recoupling Modulation
Received:December 30, 2018  Revised:June 14, 2019
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DOI:10.13234/j.issn.2095-2805.2019.5.11
Keywords:single-phase  current-source  high-frequency-link  matrix  power electronic transformer  de-recoupling
Fund Project:The National Natural Science Foundation of China (General Program);National Key Research and Development Project
              
AuthorInstitutionEmail
YAN Zhaoyang School of Electrical Engineering, Yanshan University, Qinhuangdao , China yanzy@ysu.edu.cn
KANG Ming School of Electrical Engineering, Yanshan University, Qinhuangdao , China
SONG Xuewei School of Electrical Engineering, Yanshan University, Qinhuangdao , China
WEI Bing'ang School of Electrical Engineering, Yanshan University, Qinhuangdao , China
DAI Huiwen School of Electrical Engineering, Yanshan University, Qinhuangdao , China
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Abstract:
      A single-phase current-source AC/AC high-frequency-link matrix power electronic transformer(PET) topology is proposed, in which a high-frequency transformer is used for magnetic coupling and power transfer, and a current-source circuit topology is used to achieve the input-output voltage conversion. The primary-side of the transformer adopts an LC filter and a matrix converter structure, while the secondary-side adopts a matrix converter and a CL filter structure. To make the bidirectional switch tube of the matrix converter work reasonably, a de-recoupling modulation strategy is proposed by combining the pre-stage unipolar frequency-doubling and post-stage HPWM, under which the pre-stage bidirectional switch tube is driven in one piece and the post-stage bidirectional switch tube is driven in a discrete manner. To broaden the transformation characteristics of the PET, the voltage and frequency conversions under the modulation strategy are verified. Based on the analysis of the modulation principle and the working states of the main circuit, simulations verify the validity and feasibility of the proposed topology and modulation strategy.
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