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首页> 外文期刊>International Journal of Innovative Computing Information and Control >SELECTIVE HARMONIC ELIMINATION PWM STRATEGY FOR THREE-LEVEL NPC INVERTERS UNDER FAULT-TOLERANT OPERATION
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SELECTIVE HARMONIC ELIMINATION PWM STRATEGY FOR THREE-LEVEL NPC INVERTERS UNDER FAULT-TOLERANT OPERATION

机译：容错运作下三级NPC逆变器的选择性谐波消除PWM策略

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摘要

To improve the reliability in high voltage and high power applications, the fault-tolerant control of three-level neutral-point-clamped (3L-NPC) inverter has been deeply studied. In this paper, the eight-switch three-phase inverter (ESTPI) is selected as the fault-tolerant topology of 3L-NPC inverter, and the synchronous modulation strategy of ESTPI is discussed for some particular application situation working at low switching frequency. The harmonic distribution of the ESTPI is analyzed firstly under synchronous modulation. To eliminate the specific low-order harmonics including the frequency tripling harmonics, the selective harmonic elimination pulse-width modulation (SHEP WM) based synchronous modulation strategy for the ESTPI is proposed in this paper, which can ensure a good performance of output voltage for 3L-NPC inverter under fault-tolerant operation. The effectiveness and feasibility of the proposed method are verified by the experimental results.
机译：为了提高高电压和高功率应用的可靠性，已经深入研究了三级中性点夹紧（3L-NPC）逆变器的容错控制。在本文中，选择了八个开关的三相逆变器（ESTPI）作为3L-NPC逆变器的容错拓扑，并且讨论了在低开关频率下工作的特定应用情况的ESTPI同步调制策略。首先在同步调制下分析ESTPI的谐波分布。为消除包括频率三倍谐波的特定低位谐波，本文提出了基于eSTPI的基于选择性谐波消除脉冲宽度调制（SHEP WM）的同步调制策略，可以保证3L的输出电压的良好性能-NPC逆变器在容错操作下。所提出的方法的有效性和可行性通过实验结果验证。

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