Multiple IGBTs open circuit faults diagnosis in voltage source inverter fed induction motor using modified slope method

8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics &Amp; Drives

Cardoso

2011

Due to the widespread adoption of variable speed ac drives in many industrial applications, power converters fault diagnosis is becoming more and more important, particularly for the voltage source inverters used in these systems. Accordingly, this paper presents a new diagnostic method that allows the real-time detection and localization of single power switch open-circuit faults in VSIfed PWM motor drives. The proposed algorithm is quite simple and just requires the measured motor phase currents and their corresponding reference signals, available from the main control system. Several simulation and experimental results using a vector controlled permanent magnet synchronous motor drive are presented, showing the diagnostic method effectiveness, through a relatively fast detection time and its robustness against false alarms. Index Terms-SingleIGBT open-circuit faults, real-time fault diagnosis, voltage source inverter, reference current errors. BIOGRAPHIES Jorge O. Estima was born in Aveiro, Portugal in 1984. He received the E. E. diploma from University of Coimbra, Portugal, in 2007. Since then, he has been a PhD student at the

Section: Introductionmentioning

confidence: 99%

Single power switch open-circuit fault diagnosis in voltage-fed PWM motor drives by the reference current errors

8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics &Amp; Drives

Cardoso

2011

“…The current space vector trajectory diameter can also be used for the localization of inverter power switch opencircuit faults [7]- [8]. Nevertheless, this technique has serious drawbacks related to slow detection, tuning and problems under low current values.…”

mentioning

confidence: 99%

Multiple Open-Circuit Faults Diagnosis in Back-to-Back Converters of PMSG Drives for Wind Turbine Systems

Jlassi

IEEE Trans. Power Electron.

Khil

et al. 2015

185

In order to increase the reliability and availability of wind turbines, condition monitoring and fault diagnosis are considered crucial means to achieve these goals. In this context, direct drives wind turbines based on permanent magnet synchronous generators (PMSGs) with full-scale power converters are an emerging and promising technology. However, several statistical studies point out that power converters are a significant contributor to the overall failure rate of modern wind turbines. Accordingly, this paper presents a new algorithm for multiple open-circuit faults diagnosis in full-scale back-to-back converters, applied in PMSG drives used for wind turbine systems. The proposed method is based on a Luenberger observer and on an adaptive threshold, which can guarantee a reliable diagnosis independently of the drive operating conditions. Several simulation and experimental results using a PMSG drive with a full-scale converter are presented, showing the diagnostic algorithm effectiveness and robustness against false alarms for both generator-side and grid-side converters.Index Terms -Fault diagnosis in back-to-back converter, power switch open-circuit faults, Luenberger observer, permanent magnet machines, wind turbine systems.

“…The analysis of the current space vector was performed in [36] by the slope of the vector trajectory. A modified slope method [37] was proposed as an extension of the previous one, concerning the diagnosis of simultaneously faulty switches.…”

mentioning

confidence: 99%

Open-Circuit Fault Diagnosis in PMSG Drives for Wind Turbine Applications

Freire

IEEE Trans. Ind. Electron.

Cardoso

2013

241

Condition monitoring and fault diagnosis are currently considered crucial means to increase the reliability and availability of wind turbines, and consequently, to reduce the wind energy cost. With similar goals, direct drive wind turbines based on permanent magnet synchronous generators (PMSGs) with full-scale power converters are an emerging and promising technology. Numerous studies show that power converters are a significant contributor to the overall failure rate of modern wind turbines. In this context, open-circuit fault diagnosis in the two power converters of a PMSG drive for wind turbine applications is addressed in this paper. A diagnostic method is proposed for each power converter, allowing real-time detection and localization of multiple open-circuit faults. The proposed methods are suitable for integration into the drive controller and to trigger remedial actions. In order to prove the reliability and effectiveness of the proposed fault diagnostic methods, several simulation and experimental results are presented. Index Terms-Condition monitoring, fault diagnosis, multiple power switch open-circuit faults, permanent magnet machines, semiconductor device reliability, wind power generation I. INTRODUCTIONost reduction of the generated wind energy is essential for the wind power penetration to keep increasing quickly, through more efficient, reliable and cost-effective wind turbines. Hence, the wind turbines based on PMSGs drives are a promising technology [1], avoiding the use of gearboxes. Furthermore, along with the PMSG, a full-scale power converter is required, which allows variable speed operation and the fulfillment of rigorous grid codes.Several issues related to wind turbines such as power quality, systems stability [2] and ride-through capability during grid faults [3] have been considered over the last few years. More recently, reliability and availability of wind Manuscript