A Prototype of Modular Multilevel Converters

被引：85

作者：

Zhou, Yuebin ^{[1
]}

Jiang, Daozhuo ^{[1
]}

Hu, Pengfei ^{[1
]}

Guo, Jie ^{[1
]}

Liang, Yiqiao ^{[1
]}

Lin, Zhiyong ^{[1
]}

机构：

[1] Zhejiang Univ, Coll Elect Engn, Hangzhou 310027, Peoples R China

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2014年 / 29卷 / 07期

关键词：

Arm control unit (ACU); central control unit (CCU); modular multilevel converters (MMCs); nearest level modulation (NLM); valve-group control unit; voltage-balancing strategy; SUPPRESSION; FREQUENCY;

D O I：

10.1109/TPEL.2013.2278338

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

080906 [电磁信息功能材料与结构]; 082806 [农业信息与电气工程];

摘要：

This paper introduces a modular multilevel converter (MMC) based prototype for investigating the control of large-scale MMCs. The prototype contains 264 submodules (SMs) totally, which are designed in such a way that they can be rearranged between the half-bridge model and full-bridge model conveniently. Therefore, the characteristics of various typologies based on voltage-sourced converters can be studied. Meanwhile, a novel control system for large-scale MMCs is proposed, which is characterized for modular design and excellent expansibility. The designed control system is composed of one central control unit and several arm control units, while each arm control unit is composed of several valve-group control units. Besides, a new voltage-balancing method composed of internal voltage balance and external voltage balance is proposed to balance the SM voltages. Finally, experiments on a three-phase dc/ac MMC are carried out to verify the prototype and the control system, as well as the new voltage-balancing method. The results show that the proposed control system is feasible and the new voltage-balancing method is valid.

引用

页码：3267 / 3278

页数：12

共 27 条

[1]

Open-Loop Control of Modular Multilevel Converters Using Estimation of Stored Energy [J].