Increasing sensitivity of stator winding short circuit fault indicator in inverter fed induction machines

Stojcic, G.; Stankovic, John A.; Joksimović, Gojko; Vašak, Mario; Perić, Nedjeljko; Wolbank, T.M.

doi:10.1109/epepemc.2012.6397261

Cited by 11 publications

(2 citation statements)

References 12 publications

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“…Therefore, in order to stop the fault development, induced voltage in the generator stator windings needs to be restricted and kept under some safe value K obtained from the machine diagnostics. To this aim, the K restriction is to be imposed on stator flux time-derivative, which is the main contribution to the induced stator voltage: The value K is determined based on fault identification procedure through machine fault monitoring and characterization techniques [11,12]. Following from (20) this restricts the induced voltage in faulted turns and, in the case of interturn short circuit, also the circulating currents responsible for local overheating.…”

Section: Fault-tolerant Controlmentioning

confidence: 99%

Influence of Wind Turbine Generator Fault-tolerant Control on Power Production Quality

Lešić

Vašak

Perić

et al. 2014

7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014)

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Renewable energy sources bring to fore the significance of power electronics and corresponding control. The topic of wind turbine fault-tolerant control has emerged as a promising line of research for improving their market competence. The paper presents summarized control of wind turbine converter with a fault-tolerant control extension for generator electromechanical faults, based on a proper modulation of the stator magnetic flux. The modulation also introduces hard periodic oscillations in the stator currents and generator output power. Simulation results obtained with a Matlab-Simplorer co-simulation and detailed power converter model show that DC-link capacitor and corresponding control algorithm act like an energy buffer that suppress the influence of generator stator oscillations on currents passed to the grid and maintain the high quality of power production. Following from the results, the generator and grid side controls are justified to be considered as two independent problems.

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Section: Fault-tolerant Controlmentioning

confidence: 99%

Influence of Wind Turbine Generator Fault-tolerant Control on Power Production Quality

Lešić

Vašak

Perić

et al. 2014

7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014)

Self Cite

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“…In the second group, a sequence of predefined switching vectors is applied during null pulse width modulation (PWM) period, and then fault information is extracted from the current trajectory or its derivative [17][18][19]. Similarly, the FI is also proposed based on zero-sequence voltage (ZSV) [20].…”

Section: Introductionmentioning

confidence: 99%

Stator inter‐turn fault detection in closed‐loop controlled drive based on switching sideband harmonics in CMV

Huang

Hou

et al. 2017

IET Electric Power Applications

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This study proposes a method for stator fault detection of inverter-fed induction machine in closed-loop control. The sideband response of inverter switching harmonics in common-mode voltage (CMV) is employed to detect the stator inter-turn fault, thus no additional injected signal is necessary. However, the PWM nature harmonics introduce undesired CMV signals, depending on the inherent imbalance or resistance asymmetry. For this reason, the CMV amplitude is not suitable to indicate the fault directly. In this study, the behaviour of switching harmonic is analysed first, and then a simple but efficient stator fault model is demonstrated. To suppress the adverse interference from inverter, an inter-turn fault indicator is proposed by utilising both of the switching sidebands. This method can obtain fault location and severity with low sensitivity to steady operating condition and stator imbalance. The experimental results validate the effectiveness of the proposed method.

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Stator inter‐turn faults diagnosis in induction motors using zero‐sequence signal injection

Otero

Barrera

Bossio

et al. 2020

IET Electric Power Applications

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This study presents a strategy for stator inter-turn faults diagnosis in induction motors (IMs) operating under timevariable load and time-variable speed conditions. The strategy consists in injecting a zero-sequence high-frequency signal in order to analyse variations in the stator inductances. Incipient stator inter-turn faults are detected by a simple signal processing of the derivatives of the currents. A feature of the strategy is that the zero-sequence high-frequency signal is generated by the inverter that feeds the machine, without modifying the standard space vector modulation of the IM-drive. Experimental results show that faults representing <1% of the stator winding can be detected, as well as the phase location of the fault, validating this proposal.

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Increasing sensitivity of stator winding short circuit fault indicator in inverter fed induction machines

Cited by 11 publications

References 12 publications

Influence of Wind Turbine Generator Fault-tolerant Control on Power Production Quality

Influence of Wind Turbine Generator Fault-tolerant Control on Power Production Quality

Stator inter‐turn fault detection in closed‐loop controlled drive based on switching sideband harmonics in CMV

Stator inter‐turn faults diagnosis in induction motors using zero‐sequence signal injection

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