Analysis and Calculation of DC-Link Current and Voltage Ripples for Three-Phase Inverter With Unbalanced Load

被引：103
|
作者：
Pei, Xuejun [1 ]
Zhou, Wu [1 ]
Kang, Yong [1 ]
机构：
[1] Huazhong Univ Sci & Technol, State Key Lab Adv Electromagnet Engn & Technol, Wuhan 430074, Peoples R China
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2015年 / 30卷 / 10期
关键词：
DC-link current; double fundamental frequency harmonic; symmetrical components method; unbalanced load; BUS CAPACITOR; STRATEGY;
D O I：
10.1109/TPEL.2014.2375353
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, an analysis and calculation of the dc-link current and voltage ripples are presented for a three-phase inverter with unbalanced load. A comparison of the dc-link average and root-mean-square (rms) currents between considering and ignoring high frequency harmonics of the output current is drawn. It is shown that high frequency harmonic currents have little effect on the dc-link current, and therefore, they can be ignored. Based on the symmetrical components method, the dc-link average and harmonic rms currents are derived, and the dc-link voltage ripple is compared between the balanced and unbalanced loads. It can be found that the dc-link current and voltage ripples consist of not only high frequency harmonics but also the double fundamental frequency harmonic, and the voltage ripple is independent of the positive-sequence component and determined by the negative-sequence component, under the unbalanced load. Experimental results are shown to verify the accuracy of the theoretical analysis.
引用
收藏
页码：5401 / 5412
页数：12
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