Lifetime Extension of DC-Link Capacitors in Three-Level Inverters Based on the Neutral-Point Current

被引：0
|
作者：
Choi, Hye-Won [1 ]
Bae, Yun-Jae [1 ]
Lee, Kyo-Beum [1 ]
机构：
[1] Ajou Univ, Dept Elect & Comp Engn, Suwon, South Korea
来源：
JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY | 2024年
基金：
新加坡国家研究基金会;
关键词：
Three-level neutral-point clamped inverter; DC-link ripple current; Neutral-point current; Modulation index; Reliability; Capacitor lifetime; CLAMPED INVERTER; RIPPLE CURRENT; REDUCTION;
D O I：
10.1007/s42835-024-01983-9
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：
This paper proposes the lifetime extension of DC-link capacitors in three-level inverters based on the neutral-point (NP) current. High-capacity inverters require large-size capacitors to maintain robust DC-link voltage. The proposed method suppresses the ripple current of the DC-link capacitors by replacing the switching states, which are optimized for two specific modulation index regions in the linear modulation range. The reliability of the DC-link capacitors is analyzed using a capacitor lifetime model. The validation of the proposed method is supported by simulation and experimental results across various conditions.
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收藏
页数：9
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