| 一种具有中点电位平衡功能的三电平空间矢量调制方法及其实现 |
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| 引用本文： | 宋文祥,陈国呈,武慧,孙承波.一种具有中点电位平衡功能的三电平空间矢量调制方法及其实现[J].中国电机工程学报,2006,26(12):95-100. |
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| 作者姓名： | 宋文祥 陈国呈 武慧 孙承波 |
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| 作者单位： | 1. 上海大学电站自动化重点实验室,上海市,闸北区,200072
2. 上海新源变频电器股份有限公司,上海市,闸北区,200072 |
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| 基金项目： | 上海市重点学科建设项目资助(T0103) |
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| 摘 要： | 基于冗余电压矢量的不同处理,提出一种三电平空间电压矢量调制模式这种调制模式较之常见的八段对称式SVPWM具有明显的谐波和控制优势。为解决三电平逆变器中点波动问题,基于这种调制方法提出了一种新的中点电压平衡控制方法,推导了分配因子计算公式,这种方法只需直流电容电压和负载三相电流的信息,通过调整小矢量对的时间分配因子实现对中点电流的精确控制。控制算法简便易行,有利于计算机数字化实现。所提出控制方法的有效性通过仿真和实验研究得到了证实。
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| 关 键 词： | 中点箝位式逆变器 空间矢量调制 中点电压平衡 分配因子 |
| 文章编号： | 0258-8013（2006）12-0095-06 |
| 收稿时间： | 2006-01-29 |
| 修稿时间： | 2006年1月29日 |
A Novel SVPWM Strategy and Its Implementation Considering Neutral-point Potential Balancing for Three-level NPC Inverter |
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| SONG Wen-xiang,CHEN Guo-cheng,WU Hui,SUN Cheng-bo.A Novel SVPWM Strategy and Its Implementation Considering Neutral-point Potential Balancing for Three-level NPC Inverter[J].Proceedings of the CSEE,2006,26(12):95-100. |
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| Authors: | SONG Wen-xiang CHEN Guo-cheng WU Hui SUN Cheng-bo |
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| Abstract: | This paper proposes a novel SVPWM strategy for the three-level neutral-point-clamped voltage source inverter,based on the particular disposition of all the redundant voltage vectors.The new modulation approach shows superior performance for the harmonic voltage and the control of neutral-point potential compared to the popular eight-stage centered SVPWM and realizes the balancing control of inverter neutral-point potential by modifying redundant small vectors pairs' distribution factor accurately,only requiring the information of dc-link capacitor voltages and three-phase load currents,which is convenient to apply and is compatible of digital computer realization.The feasibility of the proposed control approach has been verified via simulation and experiment results. |
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| Keywords: | Neutral-point-clamped inverter Neutral-point potential control space vector pulse width modulation(SVPWM) Distribution factor |
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