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• W2915983958 abstract "This paper presents a fault diagnosis method and system reconfiguration strategy of a three-level neutral-point-clamped cascaded inverter (3L-NPC-CI) to enhance the reliability of power supply in an electrified railway. First, the neural network (NN) is employed to perform an open-circuit fault diagnosis and identify fault switches. Then, system reconfiguration strategy is proposed to perform a single-phase 3L-NPC-CI reconfiguration. Through the analysis of the operation status of 3L-NPC, there are eight fault modes in a single-bridge arm, including the single-switch fault and double-switch 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 NN is constructed, and the seven feature vectors are the input layer of the NN. 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 the traction power supply system." @default.
• W2915983958 created "2019-03-02" @default.
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• W2915983958 date "2019-01-01" @default.
• W2915983958 modified "2023-10-05" @default.
• W2915983958 title "Fault Diagnosis and System Reconfiguration Strategy of Single-phase Three Level Neutral-Point-Clamped Cascaded Inverter" @default.
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• W2915983958 doi "https://doi.org/10.1109/tia.2019.2901359" @default.
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