| 新型Z源不对称三电平逆变器及中点电位控制方法研究 |
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| 引用本文： | 马黎,魏金成,邱晓初,魏力.新型Z源不对称三电平逆变器及中点电位控制方法研究[J].电源学报,2018,16(3):120-127. |
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| 作者姓名： | 马黎 魏金成 邱晓初 魏力 |
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| 作者单位： | 西华大学电气与电子信息学院 |
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| 基金项目： | 四川省重点学科基金资助项目（SZD0503-09-0）；四川省电力电子节能技术与装备重点实验室基金资助项目（SZJJ2016-049）；西华大学研究生创新基金资助项目（ycjj2016155） |
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| 摘 要： | 为克服单Z源中点箝位型NPC(neutral point clamped)三电平逆变器主电路所需器件多、硬件成本高的缺点,提出了一种新型Z源不对称三电平逆变器拓扑结构,该拓扑不需要箝位二极管,同时保持了Z源三电平逆变器的固有优势。根据其特有的上、下直通状态插入规律以及对中点电位的影响,提出一种最优空间矢量脉宽调制SVPWM(space vector pulse width modulation)控制策略,通过调节上、下直通时间,在实现直流升压的同时有效抑制了中点电位的偏移,且最大程度减小了直通动作产生的开关损耗。通过MATLAB/Simulink仿真,验证了该方法的可行性和有效性。
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| 关 键 词： | Z源逆变器 不对称桥臂 三电平逆变器 空间矢量脉宽调制 中点电位平衡 |
| 收稿时间： | 2016/6/12 0:00:00 |
| 修稿时间： | 2018/3/27 0:00:00 |
Research on Novel Z-source Asymmetric Three-level Inverter and Neutral-point Potential Control Method |
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| MA Li,WEI Jincheng,QIU Xiaochu and WEI Li.Research on Novel Z-source Asymmetric Three-level Inverter and Neutral-point Potential Control Method[J].Journal of power supply,2018,16(3):120-127. |
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| Authors: | MA Li WEI Jincheng QIU Xiaochu and WEI Li |
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| Affiliation: | School of Electrical Engineering and Electronic Information, Xihua University, Chengdu 610039, China,School of Electrical Engineering and Electronic Information, Xihua University, Chengdu 610039, China,School of Electrical Engineering and Electronic Information, Xihua University, Chengdu 610039, China and School of Electrical Engineering and Electronic Information, Xihua University, Chengdu 610039, China |
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| Abstract: | The main circuit of a single Z-source neutral-point-clamped(NPC) three-level inverter requires numerous elements, which results in higher hardware cost. To overcome these disadvantages, a novel topological structure of Z-source asymmetric three-level inverter is proposed, which does not need any clamp diode while maintaining the inherent advantages of Z-source three-level inverters. According to its unique insertion laws of upper and lower shoot-through states as well as its influence on the neutral-point potential, a kind of optimal space vector pulse width modulation(SVPWM) control strategy is proposed. By adjusting the upper and lower shoot-through time, the novel inverter not only maintains the desired boosted DC output voltage, but also effectively restrains the offset of neutral-point potential; meanwhile, the switching loss resulting from the shoot-through action is reduced to a maximum extent. Through simulations in MATLAB/Simulink, the feasibility and effectiveness of the proposed method is verified. |
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| Keywords: | Z-source inverter asymmetric bridge-arm three-level inverter space vector pulse width modulation (SVPWM) neutral-point potential balance |
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