Comparative Study of Fault Mitigation Techniques of Level Three Neutral Clamped Inverter Fed Induction Motor Drive
Y. Krishna Priya1, M. Vijaya Kumar2

1Y. Krishna Priya, Assistant Professor, Department of Electrical & Electronics Engineering, Anantha Lakshmi Institute of Technology & Sciences, Ananthapur (Andhra Pradesh), India.
2Dr. M. Vijaya Kumar, Professor, Department of Electrical & Electronics Engineering, JNTUA Engineering College, Ananthapur (Andhra Pradesh), India.
Manuscript received on 22 April 2019 | Revised Manuscript received on 01 May 2019 | Manuscript Published on 08 May 2019 | PP: 17-21 | Volume-7 Issue-5S3 February 2019 | Retrieval Number: E11030275S19/19©BEIESP
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Abstract: For power applications having high voltages multi-level inverters gain more attentiveness in comparison to conventional two level power converters due to less harmonic deformation, elevated DC link voltage, low EMI. But faults can affect the performance of multi-level inverters. By the large, 70% of the occuring faults in multi-level inverter circuits are open circuit faults. When faults exist in the system, fault mitigation is also a prior important task for the efficient operation of the system. In this paper, a comparison between two fault mitigation techniques, former the conventional asymmetrical PWM and latter the leg four implementation were provided which were simulated in the software MATLAB/SIMULINK and the results were shown at the instants of prior to fault, during fault and fault after mitigation.
Keywords: Neutral Clamped Multi Level Inverter, Induction Motor Drive, Open Fault, Asymmetrical Sinusoidal Pulse Width Modulation, Mitigation.
Scope of the Article: Routing, Switching and Addressing Techniques