An Open-Circuit Fault Diagnosis Approach for Single-Phase Three-Level Neutral-Point-Clamped Converters

Ge, Xinglai; Pu, Junkai; Gou, Bin; Liu, Yong-Chao

doi:10.1109/tpel.2017.2691804

Cited by 132 publications

(60 citation statements)

References 26 publications

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“…CHB has been applied in the Power Electronic Traction Transformer (PETT) for the 15 kV single-phase voltage traction system in Europe. Compared with CHB, a three-level neutral point clamped cascaded converter (3LNPC-CC) has larger capacity, lower voltage stress and better harmonics with the same number of modules [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Voltage-Balancing Strategy for Three-Level Neutral Point Clamped Cascade Converter under Sequence Pulse Modulation

Yu¹,

Xu²,

Zhou³

et al. 2019

Energies

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In response to the unbalanced DC-port fault of three-level neutral point clamped cascaded converter (3LNPC-CC), a sequence pulse modulation (SPM) voltage-balancing strategy is proposed in this paper to balance DC-link voltage, not only within the module but also among modules. With the steps of carrier cascaded calculation and sequence pulse generator, the voltage level of cascaded modules would take a smooth transition. Then the limitation of the SPM strategy is calculated according to the law of volt-second balance and the law of energy conservation. The proposed strategy has the advantage of simple calculation and control stability. Simulation and experimental results show the superiority of the proposed strategy.

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Section: Introductionmentioning

confidence: 99%

Voltage-Balancing Strategy for Three-Level Neutral Point Clamped Cascade Converter under Sequence Pulse Modulation

Yu¹,

Xu²,

Zhou³

et al. 2019

Energies

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show abstract

“…Notwithstanding, current signals have the hysteresis effect, which can cause a little time delay. So it is quite essential to improve the diagnostic speed for the current-type diagnostic approaches [16]. Therefore, currently fast-acting current-type diagnostic algorithms have realized universal application in electric vehicles because of their lower expense and high reliability.…”

Section: Introductionmentioning

confidence: 99%

A New Diagnostic Algorithm for Multiple IGBTs Open Circuit Faults by the Phase Currents for Power Inverter in Electric Vehicles

Wei

Zhang

et al. 2018

Energies

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In order to simplify the application and improve diagnostic speed of the diagnostics, a novel method to diagnose multiple open circuit faults in insulated gate bipolar transistors (IGBTs) by three-phase currents for power inverter in electric vehicles is presented. The summation of currents with semi-period phase-difference is described in diagnostic variables with exploration of the current information in faulty condition. In contrast with plentiful existing methods which rely on the motor models and control parameters, this algorithm merely requires phase currents. Meanwhile, the normalized way based on the absolute phase currents and variable parameter moving average method are applied to improve the diagnostic speed and independence of load variation, which contributes to the real-time application in the electric vehicles. Experimental results, using a vector-controlled permanent magnet synchronous motor (PMSM) and digital signal processor MC56F8346, are presented to verify the algorithm effectiveness, showing many features, such as applicability for multiple open circuit faults, well-robustness against false alarms, briefness and agility for the diagnosis function.

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“…Apart from IGBT open-circuit fault, sensor fault is also one of the main concerns in this thesis. Generally, there are four common types of sensor faults according to the sensor measurement output: stuck fault, drift fault, gain fault, and noise fault, which are expressed mathematically in (2-16) - (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19).…”

Section: Sensor Fault Analysismentioning

confidence: 99%

“…To complete the sliding-window scheme, the definition of credibility should be proposed. As discussed above, ELM/RVFL multi-classification rule is concluded as: (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14) where G refers to the outlier evaluation value, µ denotes the mean, and σ denotes standard deviation of output nodes value, respectively. As shown in the Fig 3.8(a), if the maximum value is an outlier, the credibility G is high and the result is classified as a credible output.…”

Section: The Design Of Sliding-window Classifiermentioning

confidence: 99%

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Data-driven fault diagnosis in the converter system

Xia¹

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Firstly, the author would like to extend sincere appreciation for his supervisor, Asst. Prof. Xu Yan, for his patient advice, guidance and support. Enlightened by inspired communication with Prof. Xu, the novel idea can be generated in this research work. Besides, Prof. Xu's rigorous attitude of research has a great influence on the author, reshaping the author's learning and living styles. Moreover, the author truly appreciates Dr. Gou Bin, Research Fellow of EEE, who has provided considerable instruction and help, when author confronts difficulty. Those valuable advices solved a great deal of author's problems throughout the research work. Finally, yet importantly, the author would like to show his gratitude for family, which gives the author mental and financial support, as solid backing. In addition, the author also wants to thank his friends, who share pleasant time with each other.

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An Open-Circuit Fault Diagnosis Approach for Single-Phase Three-Level Neutral-Point-Clamped Converters

Cited by 132 publications

References 26 publications

Voltage-Balancing Strategy for Three-Level Neutral Point Clamped Cascade Converter under Sequence Pulse Modulation

Voltage-Balancing Strategy for Three-Level Neutral Point Clamped Cascade Converter under Sequence Pulse Modulation

A New Diagnostic Algorithm for Multiple IGBTs Open Circuit Faults by the Phase Currents for Power Inverter in Electric Vehicles

Data-driven fault diagnosis in the converter system

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