A Nonintrusive IGBT Open-Circuit Fault and Current Sensor Fault Diagnosis Method for Grid-Tied Three-phase Three-Wire Inverter with Two Current Sensors

AbstractTo improve the reliability of motor system, this paper investigates the sensor fault diagnosis methods for T-type inverter-fed dual three-phase permanent magnet synchronous motor (PMSM) drives. Generally, a T-type three-level inverter-fed dual three-phase motor drive utilizes four phase-current sensors, two direct current (DC)-link voltage sensors and one speed sensor. A series of diagnostic methods have been comprehensively proposed for the three types of sensor faults. Both the sudden error change and gradual error change of sensor faults are considered. Firstly, the diagnosis of speed sensor fault was achieved by monitoring the error between the rotating speed of stator flux and the value from speed sensor. Secondly, the large high-frequency voltage ripple of voltage difference between the estimated voltage and the reference voltage was used to identify the voltage sensor faults, and the faulty voltage sensor was determined according to the deviation of voltage difference. Thirdly, the abnormal current amplitude on harmonic subspace was adopted to identify the current sensor faults, and the faulty current sensor was located by distinguishing the current trajectory on harmonic subspace. The experiments have been taken on a laboratory prototype to verify the effectiveness of the proposed fault diagnosis schemes.

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A Random Forest and Current Fault Texture Feature–Based Method for Current Sensor Fault Diagnosis in Three-Phase PWM VSR

Frontiers in Energy Research ◽

10.3389/fenrg.2021.708456 ◽

2021 ◽

Vol 9 ◽

Author(s):

Lei Kou ◽

Xiao-dong Gong ◽

Yi Zheng ◽

Xiu-hui Ni ◽

Yang Li ◽

...

Keyword(s):

Fault Diagnosis ◽

Random Forest ◽

Texture Feature ◽

Texture Features ◽

Current Sensor ◽

Stable Operation ◽

Sensor Faults ◽

Sensor Fault ◽

Three Phase ◽

Feature Based

Three-phase PWM voltage-source rectifier (VSR) systems have been widely used in various energy conversion systems, where current sensors are the key component for state monitoring and system control. The current sensor faults may bring hidden danger or damage to the whole system; therefore, this paper proposed a random forest (RF) and current fault texture feature–based method for current sensor fault diagnosis in three-phase PWM VSR systems. First, the three-phase alternating currents (ACs) of the three-phase PWM VSR are collected to extract the current fault texture features, and no additional hardware sensors are needed to avoid causing additional unstable factors. Then, the current fault texture features are adopted to train the random forest current sensor fault detection and diagnosis (CSFDD) classifier, which is a data-driven CSFDD classifier. Finally, the effectiveness of the proposed method is verified by simulation experiments. The result shows that the current sensor faults can be detected and located successfully and that it can effectively provide fault locations for maintenance personnel to keep the stable operation of the whole system.

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A Multiple Open-Circuit Fault Diagnosis Method for Two-Level Three-Phase Voltage Source Converters Based on Average Phase Voltage Model

IEEE Journal of Emerging and Selected Topics in Power Electronics ◽

10.1109/jestpe.2021.3096851 ◽

2021 ◽

pp. 1-1

Author(s):

Weiwei Zhang ◽

Yigang He ◽

Chuankun Wang ◽

Mingyun Chen ◽

Chunsong Sui

Keyword(s):

Fault Diagnosis ◽

Open Circuit ◽

Voltage Source ◽

Voltage Source Converters ◽

Phase Voltage ◽

Three Phase ◽

Diagnosis Method ◽

Circuit Fault Diagnosis

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Fast and accurate open-circuit fault diagnosis method for PWM voltage source inverters in the three-phase PMSM control systems

Journal of Physics Conference Series ◽

10.1088/1742-6596/1303/1/012114 ◽

2019 ◽

Vol 1303 ◽

pp. 012114

Author(s):

Jun Sun ◽

Min Zhu ◽

Xinxiu Zhou ◽

Yufei Xu ◽

Yi Xu

Keyword(s):

Fault Diagnosis ◽

Control Systems ◽

Open Circuit ◽

Voltage Source ◽

Voltage Source Inverters ◽

Three Phase ◽

Diagnosis Method ◽

Circuit Fault Diagnosis

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A Hybrid System Model-Based Open-Circuit Fault Diagnosis Method of Three-Phase Voltage-Source Inverters for PMSM Drive Systems

Electronics ◽

10.3390/electronics9081251 ◽

2020 ◽

Vol 9 (8) ◽

pp. 1251 ◽

Cited By ~ 1

Author(s):

Tao Chen ◽

Yuedou Pan ◽

Zhanbo Xiong

Keyword(s):

Fault Diagnosis ◽

Hybrid System ◽

Open Circuit ◽

System Model ◽

Voltage Source ◽

Phase Voltage ◽

Voltage Source Inverters ◽

Three Phase ◽

Diagnosis Method ◽

Drive Systems

This paper presents an open-circuit (OC) fault diagnosis method of three-phase voltage-source inverters (VSIs) for permanent magnet synchronous motor (PMSM) drive systems based on the hybrid system model (HSM). On the basis of phase voltage analysis, the HSM of the PMSM-inverter system was established, which can describe the system more accurately. To quickly diagnose whether the fault occurs, a current estimator was constructed based on the healthy HSM. Different fault types of the VSI can be simulated synchronously by the HSM, and the similarity between each simulated fault type and the actual one is evaluated based on the Euclidean distance method. Therefore, the fault isolation can be carried out according to the characteristics of Euclidean distances. The proposed method has the advantages of fast diagnosis speed and strong robustness, and it does not require additional sensors. By the presented diagnosis algorithm, the fault can be detected and isolated within a time interval about 5% and 10% of the current fundamental wave period, respectively. The simulation and experimental results verify the effectiveness of the proposed method.

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Open Circuit Fault Diagnosis and Fault Tolerance of Three-Phase Bridgeless Rectifier

Electronics ◽

10.3390/electronics7110291 ◽

2018 ◽

Vol 7 (11) ◽

pp. 291 ◽

Cited By ~ 5

Author(s):

Hong Cheng ◽

Wenbo Chen ◽

Cong Wang ◽

Jiaqing Deng

Keyword(s):

Fault Tolerance ◽

Fault Diagnosis ◽

High Efficiency ◽

Open Circuit ◽

Unity Power Factor ◽

Conduction Loss ◽

Three Phase ◽

Diagnosis Method ◽

Circuit Fault Diagnosis ◽

Hardware In Loop

Bridgeless rectifiers are widely used in many applications due to a unity power factor, lower conduction loss and high efficiency, which does not need bidirectional energy transmission. In this case, the potential failures are threatening the reliability of these converters in critical applications such as power supply and electric motor driver. In this paper, open circuit fault is analyzed, taking a three-phase bridgeless as an example. Interference on both the input and output side are considered. Then, the fault diagnosis method including detection and location, and fault tolerance through additional switches are proposed. At last, simulation and experiments based on the hardware in loop technology are used to validate the feasibility of fault diagnosis and fault tolerance methodology.

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