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LI Shaofeng,GUO Bixiang,CHENG Qiming,LYU Bin,GUO Kaijun.Research on Novel Space Vector Modulation Strategy Based on Quasi-Z Source Direct Matrix Converter[J].JOURNAL OF POWER SUPPLY,2020,18(3):151-159
Research on Novel Space Vector Modulation Strategy Based on Quasi-Z Source Direct Matrix Converter
Received:July 18, 2019  Revised:November 11, 2019
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DOI:10.13234/j.issn.2095-2805.2020.3.151
Keywords:matrix converter  quasi-Z source direct matrix converter  dual space vector modulation  through-state insertion mode
Fund Project:National Natural Science Foundation of China(61573239); Shanghai Key Laboratory Power Station Automation Technology Laboratory (13DZ2273800)
              
AuthorInstitutionEmail
LI Shaofeng State Grid Fuyang Power Supply Company, Fuyang , China
GUO Bixiang State Grid Fuyang Power Supply Company, Fuyang , China
CHENG Qiming College of Automation Engineering, Shanghai University of Electric Power, Shanghai , China
LYU Bin State Grid Fuyang Power Supply Company, Fuyang , China
GUO Kaijun State Grid Fuyang Power Supply Company, Fuyang , China
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Abstract:
      Due to the low voltage utilization of a matrix converter, its application in the field of grid-connected converters is severely limited. A quasi-Z source network is introduced into the matrix converter, and a novel through-state insertion mode is proposed to improve its voltage utilization and anti-interference ability. Firstly, the boosting principle for a quasi-Z-source direct matrix converter(QZSDMC) is analyzed. Secondly, the dual space vector modulation method is briefly introduced. Afterwards, based on the traditional modulation with the through-state instead of part of the zero-vectors, the novel through-state insertion mode is proposed, in which the 10 equal parts of a through-state zero-vector are inserted into the SVPWM modulation strategy, thereby reducing the fluctuations of capacitor voltage and inductor current of the Z-source network in its steady state. Finally, a simulation model and an experimental platform of the QZSDMC were built, and results verified the correctness and effectiveness of the novel modulation strategy.
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