Model Predictive Control With Common-Mode Voltage Injection for Modular Multilevel Converter

被引：93
|
作者：
Dekka, Apparao [1 ]
Wu, Bin [1 ]
Yaramasu, Venkata [2 ]
Zargari, Navid Reza [3 ]
机构：
[1] Ryerson Univ, Dept Elect & Comp Engn, Toronto, ON M5B 2K3, Canada
[2] No Arizona Univ, Dept Elect Engn & Comp Sci, Flagstaff, AZ 86001 USA
[3] Rockwell Automat, Medium Voltage Dr R&D, Cambridge, ON N1R 5X1, Canada
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2017年 / 32卷 / 03期
关键词：
Capacitor voltage ripple; circulating current (CC); common-mode voltage (CMV); model predictive control (MPC); modular multilevel converter (MMC); three-level flying capacitor (3L-FC) cell; total harmonic distortion (THD); H-BRIDGE INVERTERS; HVDC; ALGORITHM; OPERATION; SYSTEM; MMC;
D O I：
10.1109/TPEL.2016.2558579
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：
Submodule (SM) capacitor voltage ripple is one of the major concerns in modular multilevel converters (MMCs). Capacitor voltage ripple leads to the double-frequency circulating current (CC) in legs, thereby resulting in a cascading effect of increased peak value of the arm current, semiconductor device stress, and power losses in MMCs. In this study, a model predictive control (MPC) with common-mode voltage (CMV) injection is proposed to minimize capacitor voltage ripple and the magnitude of CC. A discrete-time mathematical model of the MMC with CMV is presented to predict the future behavior of the control variables. The injection of CMV guarantees arm voltage balancing without CC control and long-term stability of MMC without large capacitors. The dynamic and steady-state performances of MPC with CMV injection are verified on an MMC with three-level flying capacitor SMs. A performance comparison between the proposed approach and the conventional MPCis also presented. Simulation and experimental studies show that CMV injection significantly reduces the capacitor voltage ripple and theCCin legs. The proposed approach also improves output voltage and current waveform quality.
引用
收藏
页码：1767 / 1778
页数：12
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