An Novel Six-Segment Modulation Strategy for Three-Phase Isolated PFC Converter

Huaibao Wang, Sheng Wang, Hao Ding, Changli Shi, Dongqiang Jia, Chao Chen and Josep M. Guerrero
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Huaibao Wang: Electrical Engineering Department, Yanshan University, Qinhuangdao 066004, China
Sheng Wang: Electrical Engineering Department, Yanshan University, Qinhuangdao 066004, China
Hao Ding: Electrical Engineering Department, Yanshan University, Qinhuangdao 066004, China
Changli Shi: Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
Dongqiang Jia: State Grid Beijing Electric Power Company, Beijing 100031, China
Chao Chen: State Grid Jiaxing Electric Power Supply Company, Jiaxing 314001, China
Josep M. Guerrero: Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark

Energies, 2022, vol. 15, issue 7, 1-14

Abstract: A three-phase isolated rectifier features bidirectional power conversion and galvanic isolation, and is attractive as a high-efficiency energy conversion system. However, when a conventional modulation is applied to this rectifier, the excessive DC-link current ripple will result in increasing switching losses or the size of DC-link inductance, which is not cost-effective. In order to effectively reduce the current ripple, this paper proposes a “six segment” PWM (Pulse Width Modulation) strategy. It can significantly reduce the current ripple compared with the existing “eight segment” PWM strategy. Meanwhile, the current quality of the grid is improved. Finally, the experimental tests were carried out. The experimental results reveal that, compared to the traditional “eight segment” PWM, the dc-side current ripple significantly reduced from 2 A to 0.8 A, the total harmonic distortion significantly reduced from 5.69% to 2.41%, and the power factor increased from 0.87 to 0.99, verifying the effectiveness of the proposed method.

Keywords: energy conversion system; three-phase isolated rectifier; space vector modulation; current ripple (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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