The DC Inductor Current Ripple Reduction Method for a Two-Stage Power Conversion System

被引：1
|
作者：
Kim, Hyeong-Jin [1 ]
Park, Yong-Min [2 ]
Son, Yung-Deug [3 ]
Kang, Jae-Beom [1 ,4 ]
Lee, Ji-Young [1 ,4 ]
Kim, Jang-Mok [5 ]
机构：
[1] Korea Electrotechnol Res Inst, Air Mobil Elect Motor & Drive Res Team, Chang Won 51543, South Korea
[2] Battery Res Ctr, BNY Energy, Ulsan 44428, South Korea
[3] Korea Univ Technol & Educ, Dept Mech Facil Control Engn, Cheonan 31253, South Korea
[4] Korea Univ Sci & Technol, Energy & Power Convers Engn Dept, Daejeon 34113, South Korea
[5] Pusan Natl Univ, Dept Elect Engn, Busan 46241, South Korea
来源：
ELECTRONICS | 2023年 / 12卷 / 14期
关键词：
two-stage power conversion system; battery simulator; three-parallel three-level DC-DC converter; current ripple; circulating current;
D O I：
10.3390/electronics12143005
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper proposes a method for minimizing the inductor current ripple of a DC-DC converter in a two-stage power conversion system consisting of a grid-connected PWM converter and an interleaved multiphase three-level DC-DC converter. To reduce the output voltage ripple, the three-level DC-DC converter is configured in parallel and operated interleaved. However, a circulating current generated by the interleaved operation increases the inductor current ripple of each DC-DC converter and causes system loss and inductor saturation. In this paper, the inductor and output current ripple of the interleaved three-phase three-level DC-DC converter is mathematically analyzed and the effect of the DC-DC converter's duty ratio and output voltage on each current ripple is described. Based on this analysis, a method is proposed for controlling the optimal DC link voltage through the PWM converter, so that the DC-DC converter is controlled with the duty ratio that minimizes the inductor current ripple. The simulation and experimental results under various operating conditions are presented to verify the feasibility of the proposed control method.
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收藏
页数：16
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