Real-Time IGBT Open-Circuit Fault Diagnosis in Three-Level Neutral-Point-Clamped Voltage-Source Rectifiers Based on Instant Voltage Error

Caseiro, Luis M. A.; Mendes, André M. S.

doi:10.1109/tie.2014.2341558

Cited by 146 publications

(60 citation statements)

References 38 publications

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“…Besides above mentioned methods, there are many methods to detect the faulty switch in the NPC converter based on the distortions of the outputs like current, voltage, and etc [22]- [23]. Most of methods are considering the rectifier operations because, under this condition, the NPC converter has the different distortion characteristics in all cases.…”

mentioning

confidence: 99%

Open-Circuit Fault Diagnosis and Fault-Tolerant Control for a Grid-Connected NPC Inverter

Choi

Lee

Blaabjerg

et al. 2015

IEEE Trans. Power Electron.

184

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This paper presents an open-circuit fault detection method for a grid-connected NeutralPoint Clamped (NPC) inverter system. Further, a fault-tolerant control method under an open-circuit fault in clamping diodes is proposed. Under the grid-connected condition, it is impossible to identify the location of a faulty switch by the conventional methods which usually use the distortion of outputs because the distortion of the outputs is the same in some fault cases. The proposed fault detection method identifies the location of the faulty switch and the faulty clamping diode of the NPC inverter without any additional hardware or complex calculations. In the case of the clamping diode faults, the NPC inverter can transfer full rated power with sinusoidal currents by the proposed fault-tolerant control. The feasibility of the proposed fault detection and fault-tolerant control methods for the gridconnected NPC inverter are verified by simulation and experimental results.

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mentioning

confidence: 99%

Open-Circuit Fault Diagnosis and Fault-Tolerant Control for a Grid-Connected NPC Inverter

Choi

Lee

Blaabjerg

et al. 2015

IEEE Trans. Power Electron.

184

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show abstract

“…In [8], a fault model based on the envelope of the voltage between the output lines of the inverter was used for fault diagnosis. [9] proposed an analytical model based on the difference between the instantaneous voltage of the fault state and the measured signal. However, voltage-based methods need additional voltage sensors and complex analysis unit and are easily affected by the change of load.…”

Section: Introductionmentioning

confidence: 99%

NPC Three-Level Inverter Open-Circuit Fault Diagnosis Based on Adaptive Electrical Period Partition and Random Forest

Liu

Wan

et al. 2020

Journal of Sensors

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Fault detection can increase the reliability and efficiency of power electronic converters employed in power systems. Among the converters in the power system, a Neutral Point Clamped (NPC) three-level inverter is most commonly used to drive electric motors. In this paper, a new approach for open-circuit fault detection and location of the NPC three-level inverter for a shifting process using a constant voltage-to-frequency ratio is proposed. In order to diagnose open-circuit fault in as short a time as possible, an adaptive electrical period partition (AEPP) algorithm is proposed to pick single electrical periods from real-time three-phase current signals. The Maximal Overlap Discrete Wavelet Transformation (MODWT) and Park’s Vector Modulus (PVM) are used for feature analysis and normalization of electrical period signals. The statistical characteristics of the electrical period signals are extracted, and a random forest model is constructed to realize the state classification. Compared with the traditional fault diagnosis method, the proposed algorithm finds fault locations quickly and accurately. The effectiveness and accuracy of the proposed algorithm are verified by experiments.

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“…Some researchers have also studied the techniques in which extra hardware is not necessary. In Reference [30], a real-time fault diagnostic method was introduced. By analyzing the instant converter voltages, additional hardware was not necessary.…”

Section: Introductionmentioning

confidence: 99%

“…As aforementioned, some of the diagnostic techniques are based on the observers [8,17,30,32]. The structures of the observers are deduced from the mathematical models of the systems.…”

Section: Introductionmentioning

confidence: 99%

Sliding-Mode-Observer-Based Open-Switch Diagnostic Method for Permanent Magnet Synchronous Motor Drive Connected with LC Filter

Wang¹,

Xu²,

Zou³

2019

Energies

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At present, pulse width modulation (PWM) technique is widely applied in motor drive systems. However, it may cause some unexpected effects: Bearing currents, overvoltage, power losses and unwanted noise. In some industrial cases, LC filters are always equipped in motor drive systems to suppress those unexpected effects. In order to improve the reliability and safety of the drive system, fault diagnostic strategies for power switches should be utilized as other drive systems without LC filters. In the literature, some open-switch diagnostic approaches are based on the observers derived from the mathematical models. However, the models are changed by the LC filters. Therefore, the existing approaches, based on the observers are failed, due to the change of the models. This study proposes an open-switch diagnostic method for permanent magnet synchronous motor (PMSM) drive equipped with LC Filter. The novelty of the proposed method is that the model of the LC filter is considered. Therefore, open-switch faults can be detected and located in the drive systems with LC filters. The switching function model of the drive system is analyzed at first. Then a sliding mode observer (SMO) considering the model of the filter is proposed to estimate the filter voltages and other state variables. Consequently, the faults can be detected and located through the residual errors between the expected and estimated filter voltages. This approach features simplicity. Furthermore, any extra sensors are not necessary. Experimental results on a 750-W PMSM drive system with an LC filter proved the feasibility of the proposed method.

show abstract

Real-Time IGBT Open-Circuit Fault Diagnosis in Three-Level Neutral-Point-Clamped Voltage-Source Rectifiers Based on Instant Voltage Error

Cited by 146 publications

References 38 publications

Open-Circuit Fault Diagnosis and Fault-Tolerant Control for a Grid-Connected NPC Inverter

Open-Circuit Fault Diagnosis and Fault-Tolerant Control for a Grid-Connected NPC Inverter

NPC Three-Level Inverter Open-Circuit Fault Diagnosis Based on Adaptive Electrical Period Partition and Random Forest

Sliding-Mode-Observer-Based Open-Switch Diagnostic Method for Permanent Magnet Synchronous Motor Drive Connected with LC Filter

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