Discontinuous Space-Vector Modulation for Three-Level PWM Rectifiers
Discontinuous Space-Vector Modulation for Three-Level PWM Rectifiers
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DOI：
10.1109/tpel.2007.915160
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发表时间：
2008-03
影响因子：
6.7
通讯作者：
L. Dalessandro;S. Round;U. Drofenik;J. W. Kolar
中科院分区：
文献类型：
--
作者：
L. Dalessandro;S. Round;U. Drofenik;J. W. Kolar
本文介绍了两种不连续脉宽调制（DPWM）方法的三相三电平整流器的实现和实验验证。DPWM的特点，如改善波形质量，降低开关损耗，减少交流侧无源元件的尺寸，进行了研究，并与传统的连续脉宽调制（CPWM）。这些特征允许实现更高的功率密度和/或效率，并且是下一代功率整流器的重要目标。通过空间矢量表示和调制函数的方法，说明了这两种DPWM策略的实现。详细分析了交流侧和直流侧电流波形，在实际调制范围内，电源电流涟漪幅度和输出中心点电流的分析、仿真和实验结果之间具有良好的一致性。最后讨论了中点电压的控制。
This paper presents the implementation and experimental verification of two discontinuous pulsewidth modulation (DPWM) methods for three-phase, three-level rectifiers. DPWM's features, such as improved waveform quality, lower switching losses, reduced ac-side passive component size, are investigated and compared to the conventional continuous pulsewidth modulation (CPWM). These features allow higher power density and/or efficiency to be achieved and are important targets for the next generation of power rectifiers. The implementation of the two DPWM strategies is explained by means of space-vectors representation and modulation functions. A detailed analysis of both ac-side and dc-side current waveforms is presented, and there is excellent agreement between the analytical, simulated and experimental results for the mains current ripple amplitude and output center-point current over the practical modulation range. Finally, the control of the center-point voltage is discussed.