Voltage source inverter fault diagnosis in variable speed AC drives, by Park's vector approach

Mendes, A. M. S.; Cardoso, António J. Marques; Saraiva, E. S.

doi:10.1049/cp:19980607

Cited by 80 publications

(24 citation statements)

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“…Thus far, several diagnostic methods have been discussed [5]- [15]. However, only the following digital signal processing-based techniques are considered here: • Park's Vector Method [10], [11] • Control Deviation Method [12] • Normalized DC Current Method [13] • Modified Normalized DC Current Method [6], [15] • Simple DC Current Method [6], [15] The advantages and drawbacks of these methods are discussed in [6], [15].…”

Section: Open-switch Fault Diagnostic Methodsmentioning

confidence: 99%

“…Therefore, system reliability and fault tolerant capability are improved. A noninvasive technique for diagnosing VSI drive failures based on the identification of unique signature patterns corresponding to the motor supply current Park's Vector is proposed in [5], [6]. A comparison of the features, cost, and limitations of fault-tolerant threephase AC motor drive topologies is investigated in [7].…”

Section: Introductionmentioning

confidence: 99%

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An Open Circuit Fault Diagnostic Technique in IGBTs for AC to DC Converters Applied in Microgrid Applications

Khomfoi¹,

Sae-Kok²,

Ngamroo³

2011

Journal of Power Electronics

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An open circuit fault diagnostic method in IGBTs for the ac to dc converters used in microgrid applications is developed in this paper. An ac to dc converter is a key technology for microgrids in order to interface both distributed generation (DG) and renewable energy resources (RES). Also, highly reliable ac to dc converters are necessary to keep converters in continuous operation as long as possible during power switch fault conditions. Therefore, the proposed fault diagnostic method is developed to reduce the fault detection time and to avoid any other fault alarms because continuous operation is desired. The proposed diagnostic method is a combination of the absolute normalized dc current technique and the false alarm suppression algorithm to overcome the long fault detection time and fault alarm problems. The simulation and experimental results show that the developed fault diagnostic method can perform fault detection within about one cycle. The results illustrate that the reliability of an ac to dc converter interfaced with a microgrid can be improved by using the proposed fault diagnostic method.

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Section: Open-switch Fault Diagnostic Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Open Circuit Fault Diagnostic Technique in IGBTs for AC to DC Converters Applied in Microgrid Applications

Khomfoi¹,

Sae-Kok²,

Ngamroo³

2011

Journal of Power Electronics

View full text Add to dashboard Cite

show abstract

“…In order to be independent of load variations, the normalization method is adopted. There are mainly three different normalized referential values: the first order harmonic coefficients of the three-phase current over one period [14]; the magnitude of the d-q axis current over one period [11]; and the average absolute values of the three-phase current over one period [9]. The first order harmonic coefficients usually require a large amount of computation due to the utilization of the discrete Fourier transform.…”

Section: Proposed Fault Diagnostic Algorithmmentioning

confidence: 99%

“…An open circuit fault diagnostic algorithm based on the Park's vector center is proposed in [11]. In this algorithm, open circuit faults are detected by calculating the position of the current trajectory's midpoint, which is the average value of the AC current space vector over one period.…”

Section: Introductionmentioning

confidence: 99%

A Fast-Acting Diagnostic Algorithm of Insulated Gate Bipolar Transistor Open Circuit Faults for Power Inverters in Electric Vehicles

Zhang

Huang³

et al. 2017

Energies

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Abstract:To improve the diagnostic detection speed in electric vehicles, a novel diagnostic algorithm of insulated gate bipolar transistor (IGBT) open circuit faults for power inverters is proposed in this paper. The average of the difference between the actual three-phase current and referential three-phase current values over one electrical period is used as the diagnostic variable. The normalization method based on the amplitude of the d-q axis referential current is applied to the diagnostic variables to improve the response speed of diagnosis, and to avoid the noise and the delay caused by signal acquisition. In the parameter discretization process, the variable parameter moving average method (VPMAM) is adopted to solve the variation of the average value over a period with the speed of the motor; hence, the diagnostic reliability of the system is improved. This algorithm is robust, independent of load variations, and has a high resistivity against false alarms. Since only the three-phase current of the motor is utilized for calculations in the time domain, a fast diagnostic detection speed can be achieved, which is significantly essential for real-time control in electric vehicles. The effectiveness of the proposed algorithm is verified by both simulation and experimental results.

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“…A parameter quantifying the errors of the normalized results is defined to detect single or multiple converter failures. Another Park's Vector based fault diagnosis approach is through identifying three phase current signature patterns [8]. It is demonstrated in AC-DC pulse width modulated (PWM) converter fault detection by observing the variation of the current angle [5,9].…”

Section: Introductionmentioning

confidence: 99%

A New Fault Diagnosis Algorithm for PMSG Wind Turbine Power Converters under Variable Wind Speed Conditions

et al. 2016

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Although Permanent Magnet Synchronous Generator (PMSG) wind turbines (WTs) mitigate gearbox impacts, they requires high reliability of generators and converters. Statistical analysis shows that the failure rate of direct-drive PMSG wind turbines' generators and inverters are high. Intelligent fault diagnosis algorithms to detect inverters faults is a premise for the condition monitoring system aimed at improving wind turbines' reliability and availability. The influences of random wind speed and diversified control strategies lead to challenges for developing intelligent fault diagnosis algorithms for converters. This paper studies open-circuit fault features of wind turbine converters in variable wind speed situations through systematic simulation and experiment. A new fault diagnosis algorithm named Wind Speed Based Normalized Current Trajectory is proposed and used to accurately detect and locate faulted IGBT in the circuit arms. It is compared to direct current monitoring and current vector trajectory pattern approaches. The results show that the proposed method has advantages in the accuracy of fault diagnosis and has superior anti-noise capability in variable wind speed situations. The impact of the control strategy is also identified. Experimental results demonstrate its applicability on practical WT condition monitoring system which is used to improve wind turbine reliability and reduce their maintenance cost.

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Voltage source inverter fault diagnosis in variable speed AC drives, by Park's vector approach

Cited by 80 publications

References 0 publications

An Open Circuit Fault Diagnostic Technique in IGBTs for AC to DC Converters Applied in Microgrid Applications

An Open Circuit Fault Diagnostic Technique in IGBTs for AC to DC Converters Applied in Microgrid Applications

A Fast-Acting Diagnostic Algorithm of Insulated Gate Bipolar Transistor Open Circuit Faults for Power Inverters in Electric Vehicles

A New Fault Diagnosis Algorithm for PMSG Wind Turbine Power Converters under Variable Wind Speed Conditions

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