Fault diagnosis and system reconfiguration strategy of single-phase cascaded inverter

Wang, Yi; He, Xiaoqiong; Han, Pengcheng; Xu, Peng; Qin, Zhen

doi:10.1109/itec-ap.2017.8080920

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…However, the application of active NPC topology and redundant circuit increase hardware cost of power converter. In [31], the fault diagnosis method based on NN and system reconfiguration strategy is proposed, but only the singleswitch fault is proved in the simulation and the experiment.…”

Section: Fig1 System Configuration Of Actpssmentioning

confidence: 99%

Fault Diagnosis and System Reconfiguration Strategy of Single-phase Three Level Neutral-Point-Clamped Cascaded Inverter

Han

Ren

et al. 2019

IEEE Trans. on Ind. Applicat.

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This paper presents a fault diagnosis method and system reconfiguration strategy of three level neutral-pointclamped cascaded inverter (3L-NPC-CI) to enhance reliability of power supply in electrified railway. First, neural network is employed to perform open-circuit fault diagnosis and identify fault switches. Then, system reconfiguration strategy is proposed to perform single phase 3L-NPC-CI reconfiguration. Through the analysis of the operation status of 3L-NPC, there are eight fault modes in single bridge arm, including single-switch fault and double-switches fault. By the feature analysis for the output arm voltage harmonic of normal and eight fault modes, seven harmonic parameters are selected as fault feature vectors. Meanwhile, a three-layer neural network is constructed, and the seven feature vectors are the input layer of the neural network. By training algorithm, the fault switches location can be identified accurately about one modulation period. Then, the fault module is bypassed and the 3L-NPC-CI system is stable by reconfiguring the modulation strategy of other normal modular. Simulation and experimental results are given to validate the proposed fault diagnosis and system reconfiguration strategy. The proposed method is able to improve robustness and reliability of 3L-NPC-CI in traction power supply system.

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Section: Fig1 System Configuration Of Actpssmentioning

confidence: 99%

Fault Diagnosis and System Reconfiguration Strategy of Single-phase Three Level Neutral-Point-Clamped Cascaded Inverter

Han

Ren

et al. 2019

IEEE Trans. on Ind. Applicat.

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“…Therefore, several OCF diagnostic methods have been proposed based on the radius and form of the current [13][14][15][16]. Instead of using the current, the OCF can be detected by output voltage for multilevel cascade inverters [17]. Otherwise, the destruction of an MOSFET in SCF mode is always linked to a thermal problem (problem of heat dissipation, thermomechanical problem of the contacts, problem in extreme conditions).…”

Section: Introductionmentioning

confidence: 99%

Real-Time Fault Detection to Ensure the Safe Operation of the Single-Phase Five-Level VIENNA Rectifier

et al. 2021

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This work aims to explore and evaluate the nonreversible AC/DC five-level structure from the point of view of its operational safety: high electrical security on internal destruction and continuity in operation. It only has low-voltage monotransistor cells (Si and SiC 600 V max) and is intrinsically tolerant to imperfection control and parasites, therefore naturally secure. The design and lab-test of fault monitoring and fault diagnosis with just one voltage sensor of a single-phase five-level VIENNA rectifier were proposed. This real-time diagnostic method allows for a safe stop or corrective control strategy based on the reconfiguration of the modulation. The reconstruction strategy allows for optimization of the current and voltage signals as well as power factor. A continuous post-fault operation can be achieved for critical applications. An experimental prototype 3 kW/230 VAC/800 VDC/32 kHz was created to validate the proposed fault diagnosis method and reconfiguration control method.

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Fault Diagnosis for the Short-Circuit Fault of the Single-phase Five-Level VIENNA Active Rectifier

Linh

Bach²,

Binh³

2020

Advances in Engineering Research and Application

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Fault diagnosis and system reconfiguration strategy of single-phase cascaded inverter

Cited by 4 publications

References 9 publications

Fault Diagnosis and System Reconfiguration Strategy of Single-phase Three Level Neutral-Point-Clamped Cascaded Inverter

Fault Diagnosis and System Reconfiguration Strategy of Single-phase Three Level Neutral-Point-Clamped Cascaded Inverter

Real-Time Fault Detection to Ensure the Safe Operation of the Single-Phase Five-Level VIENNA Rectifier

Fault Diagnosis for the Short-Circuit Fault of the Single-phase Five-Level VIENNA Active Rectifier

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