Fault-Tolerant Control Strategy for Neutral-Point-Clamped Three-Level Inverter

Shen, Yanxia; Beibei, Miao; Wu, Dinghui; Ibrahim, Kader Ali

doi:10.1155/2018/5126404

Cited by 5 publications

(2 citation statements)

References 20 publications

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“…Moreover, this method cannot be applied to different MLIs. The Active Neutral-Point-Clamped (ANPC) fault-tolerant inverter [37] has many drawbacks, but the main drawback is that it can only be applied to a three-level condition. Compared to the existing methods, the proposed method requires the most add-on components, namely for the inverter considered, which requires additional thyristors.…”

Section: Case C: Performance During Gsc Fault and Fault Reconfigurati...mentioning

confidence: 99%

Wavelet Transform Based Fault Identification and Reconfiguration for a Reduced Switch Multilevel Inverter Fed Induction Motor Drive

et al. 2021

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The multilevel inverter-based drive system is greatly affected by several faults occurring on switching elements. A faulty switch in the inverter can potentially lead to more losses, extensive downtime and reduced reliability. In this paper, a novel fault identification and reconfiguration process is proposed by using discrete wavelet transform and auxiliary switching cells. Here, the discrete wavelet transform exploits a multiresolution analysis with a feature extraction methodology for fault identification and subsequently for reconfiguration. For increasing the reliability, auxiliary switching cells are integrated to replace faulty cells in a proposed reduced-switch 5-level multilevel inverter topology. The novel reconfiguration scheme compensates open circuit and short circuit faults. The complexity of the proposed system is lower relative to existing methods. This proposed technique effectively identifies and classifies faults using the multiresolution analysis. Furthermore, the measured current and voltage values during fault reconfiguration are close to those under healthy conditions. The performance is verified using the MATLAB/Simulink platform and a hardware model.

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Section: Case C: Performance During Gsc Fault and Fault Reconfigurati...mentioning

confidence: 99%

Wavelet Transform Based Fault Identification and Reconfiguration for a Reduced Switch Multilevel Inverter Fed Induction Motor Drive

et al. 2021

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“…In phase-level redundancy, an additional converter leg is added, which can replace the faulty leg entirely or complement its operation. The redundant leg may display the same configuration as the main legs [9][10][11][12][13], effectively substituting the faulty one in post-fault operation, or a distinct topology [14][15][16][17][18][19][20], which may provide advantages in regular operation but does not entirely replace the faulty phase after the fault. Converter-level redundancy consists of the association of several identical converters, which can continue to operate even if one (or more) of them fails.…”

Section: Introductionmentioning

confidence: 99%

Fault Analysis and Non-Redundant Fault Tolerance in 3-Level Double Conversion UPS Systems Using Finite-Control-Set Model Predictive Control

Caseiro

Mendes

2021

Energies

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Fault-tolerance is critical in power electronics, especially in Uninterruptible Power Supplies, given their role in protecting critical loads. Hence, it is crucial to develop fault-tolerant techniques to improve the resilience of these systems. This paper proposes a non-redundant fault-tolerant double conversion uninterruptible power supply based on 3-level converters. The proposed solution can correct open-circuit faults in all semiconductors (IGBTs and diodes) of all converters of the system (including the DC-DC converter), ensuring full-rated post-fault operation. This technique leverages the versatility of Finite-Control-Set Model Predictive Control to implement highly specific fault correction. This type of control enables a conditional exclusion of the switching states affected by each fault, allowing the converter to avoid these states when the fault compromises their output but still use them in all other conditions. Three main types of corrective actions are used: predictive controller adaptations, hardware reconfiguration, and DC bus voltage adjustment. However, highly differentiated corrective actions are taken depending on the fault type and location, maximizing post-fault performance in each case. Faults can be corrected simultaneously in all converters, as well as some combinations of multiple faults in the same converter. Experimental results are presented demonstrating the performance of the proposed solution.

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Using FTC for a 7-Leg Inverter to Ensure Operational Continuity of Two Machines in Case of Fault

Aboub

Bouchafaa

Tabbache

et al. 2019

2019 1st International Conference on Sustainable Renewable Energy Systems and Applications (ICSRESA)

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Fault-Tolerant Control Strategy for Neutral-Point-Clamped Three-Level Inverter

Cited by 5 publications

References 20 publications

Wavelet Transform Based Fault Identification and Reconfiguration for a Reduced Switch Multilevel Inverter Fed Induction Motor Drive

Wavelet Transform Based Fault Identification and Reconfiguration for a Reduced Switch Multilevel Inverter Fed Induction Motor Drive

Fault Analysis and Non-Redundant Fault Tolerance in 3-Level Double Conversion UPS Systems Using Finite-Control-Set Model Predictive Control

Using FTC for a 7-Leg Inverter to Ensure Operational Continuity of Two Machines in Case of Fault

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