Bi-Directional Grid-Connected Modular Multilevel Converters With Direct Digital Control and D-Σ Processes

被引：4
|
作者：
Wu, Tsai-Fu [1 ]
Chou, Tzu-Chieh [1 ]
Huang, Chun-Wei [1 ]
Su, Kai [2 ]
机构：
[1] Natl Tsing Hua Univ, Dept Elect Engn, Elegant Power Elect Appl Res Lab, Hsinchu 30013, Taiwan
[2] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2019年 / 34卷 / 11期
关键词：
Cell-voltage regulation; DC-bus voltage regulation and balancing; direct digital control; division-summation (D-Sigma) processes; modular multilevel converter (MMC); power-injection mode; INVERTER;
D O I：
10.1109/TPEL.2019.2895901
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 presents bidirectional grid-connected modular multilevel converters (MMC) with direct digital control and division-summation processes to achieve power-injection and rectification functions. A direct digital control is developed to track current references, regulate dc-bus voltage and cell voltage, and balance the upper and lower dc-bus voltages. It can accommodate wide filter-inductance variation and take care of source voltage harmonics to achieve tight current tracking and low distortion output current. Based on the power-balance principle, the commands of arm currents can be determined directly. In this paper, the MMC configuration is introduced first, and then the control laws for current tracking and voltage regulation are derived in detail. Experimental and simulated results obtained from two 50 kW MMCs operated in power-injection and rectification modes have verified the analysis and discussion.
引用
收藏
页码：11290 / 11299
页数：10
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