| 三电平整流器弃用中矢量的对称三区电压矢量调制策略 |
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| 引用本文： | 伍文俊,钟彦儒,段博. 三电平整流器弃用中矢量的对称三区电压矢量调制策略[J]. 电工技术学报, 2009, 24(6) |
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| 作者姓名： | 伍文俊 钟彦儒 段博 |
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| 作者单位： | 西安理工大学自动化学院,西安,710048 |
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| 摘 要： | 根据基于目标控制的三电平PWM整流器的数学模型,详细分析了三电平各电压矢量对直流侧中点电压的影响,提出了一种弃用中矢量的对称三区的电压矢量调制策略。对该法在不同调制模式下整流器的性能进行了深入仿真研究。该方法电压矢量分区少,算法简单。由于弃用了中矢量,电压矢量调制策略本身的直流侧中点电压达到了自平衡。仿真和实验结果表明,三电平PWM整流器性能稳定,功率因数高,方法正确有效。与传统调制策略相比,当网侧电流幅值变化较大时,该方法的直流侧中点电压平衡效果仍然很好。
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| 关 键 词： | 三电平整流器 中矢量 对称三区 脉宽调制 中点电压 调制模式 |
A Symmetrical Three-Section PWM for Three-Level Rectifier With Medium Vectors Being Eliminated |
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| Wu Wenjun,Zhong Yanru,Duan Bo. A Symmetrical Three-Section PWM for Three-Level Rectifier With Medium Vectors Being Eliminated[J]. Transactions of China Electrotechnical Society, 2009, 24(6) |
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| Authors: | Wu Wenjun Zhong Yanru Duan Bo |
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| Abstract: | According to the mathematical model of three-level pulse width modulation (PWM) rectifier based on objects being controlled, the influence of various vectors on neutral-point (NP) voltage in direct current (DC) side is analyzed, andasymmetrical three-section PWM without medium vectors is proposed. On the basis of different modulating mode, the characteristics of rectifier are studied. This PWM is simpler since its vector section is reduced. Because medium-vectors are eliminated, the neutral-point voltage se... |
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| Keywords: | Three-level rectifier medium-vector symmetrical three-section PWM neutral-point voltage modulating mode |
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