A diagnosis method for open-circuit faults in NPC three-level inverters based on novel sliding mode observer

Huang, Wenzhan; Xu, Shuiqing; Wang, Juxing; Dai, Haosong; Li, Feng; Chai, Yi

doi:10.1109/safeprocess52771.2021.9693638

Cited by 4 publications

(6 citation statements)

References 15 publications

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“…An artificial intelligence-based method was suggested by [14], which is more complex to implement. [5], [16], and [23] are model-based methods. The fault diagnosis time of [5] is less than 90% of current cycles.…”

Section: Comparative Analysis Of Diagnosis Methodsmentioning

confidence: 99%

“…The fault diagnosis time of [5] is less than 90% of current cycles. [16] and [23] diagnose fewer types of faults.…”

Section: Comparative Analysis Of Diagnosis Methodsmentioning

confidence: 99%

“…Model-based methods for fault diagnosis are based on the consistency of the actual measured output and the estimated output of the model. Existing model-based methods include Luenberger observer [15], sliding mode observer [16], Kalman filtering [17], and mixed logic dynamic modeling [18]. One OC fault diagnosis method is based on a differential current observer [15].…”

Section: Introductionmentioning

confidence: 99%

“…This method improves the problem of residual sensitivity to operating state in conventional models by designing adaptive fault diagnosis thresholds. The interval sliding mode observer was applied to OC fault diagnosis of the TP-VSI due to its fast convergence and effective suppression of jitter [16]. An OC fault diagnosis method that can diagnose both current sensors and the TP-VSI has been proposed based on Kalman filtering [17].…”

Section: Introductionmentioning

confidence: 99%

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An Inverter Fault Diagnosis Method Based on Ismo and Average Log-Likelihood Ratio

Han,

Zhao,

Gao

et al. 2024

Preprint

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Section: Comparative Analysis Of Diagnosis Methodsmentioning

confidence: 99%

“…The fault diagnosis time of [5] is less than 90% of current cycles. [16] and [23] diagnose fewer types of faults.…”

Section: Comparative Analysis Of Diagnosis Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Inverter Fault Diagnosis Method Based on Ismo and Average Log-Likelihood Ratio

Han,

Zhao,

Gao

et al. 2024

Preprint

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“…In this approach, mathematical models of the converter system are used for fault detection and an observer or state estimator is used to estimate unavailable current states [19,[51][52][53][54][55][56][57][58][59][60]. The reliability of this method depends on the accuracy of the model.…”

Section: Model Based Fault Diagnostic Methodsmentioning

confidence: 99%

A Review of Open-Circuit Switch Fault Diagnostic Methods for Neutral Point Clamped Inverter

et al. 2022

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Due to numerous advantages, a neutral point clamped (NPC) inverter is a preferred choice for high-power applications and renewable technology. The reliability of the NPC inverter is a major concerning factor during the assessment of system performance as power semiconductor switches are vulnerable to abnormal conditions. Open-circuit (OC) switch faults are not as dangerous as short circuit (SC) faults but eventually have enough potential to cause cascaded failure to other components in the system and thus need to be supervised carefully. The OC faults result in a distortion of voltage and current signals in the NPC converter. Based on these signals, over the past few years, many efforts have been made to identify and localize the OC switch fault to the switch level in the NPC topology. In this paper, a review of different OC switch fault diagnostic methods is provided. Starting from the NPC inverter operation under healthy and faulty conditions, the various possible and unavailable switching states along with the deviation in pole voltage under different switch fault conditions is discussed. Then, based on the approach used for system-based fault detection, the OC fault detection methods are classified. The various OC methods are further discussed on the basis of signal, i.e., current, voltage or a combination of both signals used as a signature for fault detection. Emphasis is given to the principle involved, diagnostic variables utilized, the implementation approach and the diagnostic time required. Finally, the approaches are tabulated so as to provide a quick reference for NPC fault diagnostics.

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A Diagnostic Method for Open Circuit Faults of Power Switches in Five-Level Active-Neutral-Point-Clamped Converter

Zhou,

Qiu,

Zhang

2023

2023 IEEE PELS Students and Young Professionals Symposium (SYPS)

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A diagnosis method for open-circuit faults in NPC three-level inverters based on novel sliding mode observer

Cited by 4 publications

References 15 publications

An Inverter Fault Diagnosis Method Based on Ismo and Average Log-Likelihood Ratio

An Inverter Fault Diagnosis Method Based on Ismo and Average Log-Likelihood Ratio

A Review of Open-Circuit Switch Fault Diagnostic Methods for Neutral Point Clamped Inverter

A Diagnostic Method for Open Circuit Faults of Power Switches in Five-Level Active-Neutral-Point-Clamped Converter

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