A General Analytical Calculation of DC-Link Current and Voltage Ripple for 3L-NPC-Voltage Source Inverter

被引：0
|
作者：
Pei, Xuebing [1 ]
机构：
[1] China Ship Dev & Design Ctr, Wuhan 430064, Peoples R China
来源：
PROCEEDINGS OF THE 2015 2ND INTERNATIONAL CONFERENCE ON ELECTRICAL, COMPUTER ENGINEERING AND ELECTRONICS (ICECEE 2015) | 2015年 / 24卷
关键词：
dc-link current; voltage ripple; 3L-NPC-VSI; 2L-VSI;
D O I：
暂无
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：
In this paper, a general analytical calculation of dc-link current and voltage ripple is presented for three-level three-phase neutral-point-clamped voltage source inverter (3L-NPC-VSI). Based on the analysis of average dc-link current of the upper and lower switches, the low-frequency oscillation of the neutral point (NP) voltage can be eliminated by injecting a zero sequence component. Moreover, the general expression of the root-mean-square (RMS) dc-link current is derived. In addition, the dc-link average current, rms current, and voltage ripple of the 3L-NPC-VSI are compared with those of the 2L-VSI, and it shows similar dc-link characteristics. Simulation results are shown to verify the theoretical analysis. The results can be extended to any PDPWM with NP voltage control strategy.
引用
收藏
页码：659 / 665
页数：7
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