An Asymmetrical Power Module Design for Modular Multilevel Converter With Unidirectional Power Flow

被引：6

作者：

Mao, Hua ^{[1
]}

Jiang, Huaping ^{[1
]}

Ran, Li ^{[2
]}

Hu, Jiayu ^{[1
]}

Qiu, Guanqun ^{[1
]}

Wei, Jingfeng ^{[1
]}

Chen, Haoyu ^{[1
]}

Zhong, Xiaohan ^{[1
]}

Xiao, Nianlei ^{[1
]}

Wang, Liwei ^{[3
]}

Yang, Minxiang ^{[4
]}

机构：

[1] Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 400044, Peoples R China

[2] Univ Warwick, Sch Engn, Coventry CV4 7AL, W Midlands, England

[3] Chaoyang Microelect Technol Co Ltd, Chaoyang 110000, Peoples R China

[4] State Grid Jibei Elect Power Co Ltd, Beijing 100054, Peoples R China

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2023年 / 38卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Modular multilevel converter (MMC); power loss; power module; reliability; temperature control; IGBT MODULES; RELIABILITY; MMC; OPTIMIZATION; OPERATION; INVERTER; SYSTEM;

D O I：

10.1109/TPEL.2022.3198859

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：

Modular multilevel converters (MMCs) are widely used in grid scale power electronics. Due to the presence of a dc component in the arm current, the MMC submodules (SMs) show an unbalanced current loading profile. This may lead to some semiconductor chips being more stressed than others, significantly affecting the overall reliability. To level the junction temperatures and improve the SMreliability, this article proposes an asymmetrical power module design in line with the loading profile, allocating more chips to higher current parts. This is shown to be realistic if the power flow is unidirectional. The concept is investigated using simulation backed by experiment. It is shown that the designed power module can significantly reduce the maximum temperature and the total power loss can be reduced by 5%-8%. The chip utilization rate is also improved. The proposed module is applicable in a certain range of power factor and modulation index adjustment. This article provides a guidance for optimum design of the power module for the SMs in an MMC.

引用

页码：1092 / 1103

页数：12

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