Closed-Loop Precharge Control of Modular Multilevel Converters During Start-Up Processes

被引：71
|
作者：
Li, Binbin [1 ]
Xu, Dandan [1 ]
Zhang, Yi [1 ]
Yang, Rongfeng [1 ]
Wang, Gaolin [1 ]
Wang, Wei [1 ]
Xu, Dianguo [1 ]
机构：
[1] Harbin Inst Technol, Sch Elect Engn & Automat, Harbin 150001, Peoples R China
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2015年 / 30卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Closed-loop precharge control; modular multilevel converter (MMC); start-up scheme; VOLTAGE; CAPACITORS;
D O I：
10.1109/TPEL.2014.2334055
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 letter respectively presents two closed-loop precharge control methods to fully charge the submodule (SM) capacitors of the modular multilevel converter (MMC) during dcside and ac-side start-up processes. The proposed methods are aimed at regulating a constant charging current thus reducing the start-up time and eliminating the inrush current. Besides, capacitor voltage balancing control is also embedded into the controller to equally charge the SM capacitors. Due to the flexibility of the closed-loop control, these methods are applicable to any MMC applications regardless of the number of SMs. Finally, effectiveness of the proposed methods is verified experimentally on a three-phase prototype of MMC.
引用
收藏
页码：524 / 531
页数：8
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