| 具有飞跨电容辅助桥臂的三电平中点钳位逆变器方案 |
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| 引用本文： | 曾翔君,张晓,杨永兵,陈发,杨旭.具有飞跨电容辅助桥臂的三电平中点钳位逆变器方案[J].电力系统自动化,2014,38(8):84-90. |
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| 作者姓名： | 曾翔君 张晓 杨永兵 陈发 杨旭 |
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| 作者单位： | 西安交通大学电气工程学院, 陕西省西安市 710049 |
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| 摘 要： | 提出了一种改进的具有飞跨电容辅助桥臂的三电平中点钳位逆变器的拓扑结构,该逆变器可被应用于具有轻型高压直流传输线的近海风电系统中。第四飞跨电容辅助桥臂的引入可以解决三电平中点钳位逆变器固有的中点失衡(包括直流漂移和电压脉动)问题。首先,具体阐述了第四桥臂的工作原理,接着对三种电压闭环控制方案及其控制性能进行了分析和比较。最后,仿真和实验验证了所提出的控制方案的有效性。
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| 关 键 词： | 永磁同步发电机 轻型高压直流 飞跨电容辅助桥臂 三电平中点钳位逆变器 中点平衡控制 |
| 收稿时间： | 2013/6/25 0:00:00 |
| 修稿时间： | 2014/3/18 0:00:00 |
A Three-level Neutral-point-clamped Inverter with Flying-capacitor Auxiliary Legs |
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| ZENG Xiangjun,ZHANG Xiao,YANG Yongbing,CHEN Fa and YANG Xu.A Three-level Neutral-point-clamped Inverter with Flying-capacitor Auxiliary Legs[J].Automation of Electric Power Systems,2014,38(8):84-90. |
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| Authors: | ZENG Xiangjun ZHANG Xiao YANG Yongbing CHEN Fa and YANG Xu |
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| Abstract: | A three-level flying-capacitor (four-leg) neutral-point-clamped (3L-FC-NPC) inverter is proposed for a large offshore wind power conversion system with light high voltage direct current (HVDC) transmission. The fourth flying-capacitor (FC) leg is added to eliminate mid-point voltage imbalance of the DC link including DC drift and low-frequency voltage fluctuation. The principle of the added FC leg is discussed first. Then three different voltage closed-loop control methods are proposed and compared. Finally, simulation and experiment show the correctness of modeling and analysis. |
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| Keywords: | permanent magnet synchrony generator (PMSG) light HVDC flying-capacitor auxiliary leg three-level neutral-point-clamped (3L-NPC) inverter neutral-point balance control |
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