三相三电平NPC整流器开路故障诊断与容错控制策略的研究
Research on Open-Circuit Fault Diagnosis and Fault-Tolerant Control Strategy of Three-Phase Three-Level NPC Rectifier
DOI: 10.12677/AEPE.2021.95027, PDF,  被引量   
作者: 朱 叶, 戴 勇*：南京师范大学电气与自动化工程学院，江苏 南京；张 倩：扬州大学广陵学院，江苏 扬州；华 梅：南京国联电力工程设计有限公司，江苏 南京
关键词: 三电平整流器；开路故障；故障诊断；容错控制；Three-Level Rectifier； Open-Circuit Fault； Fault Diagnosis； Fault-Tolerant Control
摘要: 近年来，三相三电平NPC整流器在高压、大功率领域得到广泛应用，为了提高NPC三电平整流器运行的安全可靠性，研究其故障诊断和容错控制显得尤为重要。本文详细分析了整流器各开关器件发生开路故障后的电流路径和故障特征的变化，提出了一种基于电流路径的故障诊断方法；接着分析了开关管开路故障对空间电压矢量的影响，提出了一种基于参考电压矢量修正的容错控制策略。本文提出的故障诊断方法能准确定位故障开关器件，无需大量的计算且诊断迅速；所提出的容错控制方法无需增加额外的硬件，能有效提高NPC三电平整流器的可靠性。最后，通过仿真验证了所提方法的有效性。
Abstract: In recent years, the three-phase three-level NPC rectifier has been widely used in high voltage and high power fields. In order to improve the safety and reliability of NPC three-level rectifier opera-tion, it is particularly important to study its fault diagnosis and fault-tolerant control. In this paper, the changes of current flow path and fault characteristics of each switch device after open-circuit fault are analyzed in detail, and a fault diagnosis method based on current path is adopted. Then, the influence of the open-circuit fault of switch tube on space voltage vector is analyzed, and a fault-tolerant control strategy based on reference voltage vector correction is proposed. The fault detection method used in this paper can accurately locate the fault switch device, without a lot of calculation and rapid diagnosis. The proposed fault-tolerant control method does not need addi-tional hardware, which can effectively improve the reliability of NPC three-level rectifier. Finally, the effectiveness of the proposed method is verified by simulation.
文章引用：朱叶, 张倩, 华梅, 戴勇. 三相三电平NPC整流器开路故障诊断与容错控制策略的研究[J]. 电力与能源进展, 2021, 9(5): 250-262. https://doi.org/10.12677/AEPE.2021.95027

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