Common-Mode Current Reduction of Paralleled Dual Converters for Bipolar DC Distribution

被引:0
|
作者
Li, Bowei [1 ]
Ding, Li [1 ]
Wu, Xuesong [1 ]
Kish, Gregory [1 ]
Li, Yunwei [1 ]
机构
[1] Univ Alberta, Dept Elect & Comp Engn, Edmonton, AB T6G 2R3, Canada
关键词
bipolar dc distribution; asymmetrical operation; harmonics distribution; common-mode current; PWM; AC;
D O I
10.1109/APEC43580.2023.10131507
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Asymmetrical operation is a main challenge for the application of bipolar dc distribution systems. As a promising solution, paralleled dual converters balance the dc pole voltages without the penalties of increased power ratings by integrating a center-tapped transformer. The interleaving operation of dual converters could realize the harmonics cancellation of neutral line current, which is elaborated by harmonics distribution analysis presented in this paper. Moreover, phase shifting strategy is used to offer an additional degree-of-freedom ( DoF), the resultant 2DoF modulation strategy is able to significantly suppress the common-mode (CM) current, which could reduce the size of CM choke and improve power density of converter. The validity and benefit of 2DoF strategy for dual converters are verified by both simulation and experimental results.
引用
收藏
页码:543 / 549
页数:7
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