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

IF 1.6 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Journal of Electrical Engineering & Technology Pub Date : 2024-07-24 DOI:10.1007/s42835-024-01983-9

Hye-Won Choi, Yun-Jae Bae, Kyo-Beum Lee

引用次数: 0

Abstract

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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基于中性点电流延长三电平逆变器中直流链路电容器的使用寿命

本文提出了基于中性点（NP）电流延长三电平逆变器中直流链路电容器寿命的方法。大容量逆变器需要大型电容器来维持稳健的直流链路电压。所提出的方法通过替换开关状态来抑制直流链路电容器的纹波电流，开关状态针对线性调制范围内的两个特定调制指数区域进行了优化。使用电容器寿命模型分析了直流链路电容器的可靠性。各种条件下的仿真和实验结果支持对所提方法的验证。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Electrical Engineering & Technology ENGINEERING, ELECTRICAL & ELECTRONIC-

CiteScore

4.00

自引率

15.80%

发文量

321

审稿时长

3.8 months

期刊介绍： ournal of Electrical Engineering and Technology (JEET), which is the official publication of the Korean Institute of Electrical Engineers (KIEE) being published bimonthly, released the first issue in March 2006.The journal is open to submission from scholars and experts in the wide areas of electrical engineering technologies. The scope of the journal includes all issues in the field of Electrical Engineering and Technology. Included are techniques for electrical power engineering, electrical machinery and energy conversion systems, electrophysics and applications, information and controls.