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http://dx.doi.org/10.5370/KIEE.2015.64.5.718

A Novel Modulation Strategy Based on Level-Shifted PWM for Fault Tolerant Control of Cascaded Multilevel Inverters  

Kim, Seok-Min (Dept. of Space Survey Information Technology, Ajou University)
Lee, June-Seok (Dept. of Electrical and Computer Engineering, Ajou University, Korear)
Lee, Kyo-Beum (Dept. of Electrical and Computer Engineering, Ajou University)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.64, no.5, 2015 , pp. 718-725 More about this Journal
Abstract
This paper proposes a novel level-shifted PWM (LS-PWM) strategy for fault tolerant cascaded multilevel inverter. Most proposed fault-tolerant operation methods in many of studies are based on a phase-shifted PWM (PS-PWM) method. To apply these methods to multilevel inverter systems using LS-PWM, two additional steps will be implemented. During the occurrence of a single-inverter-cell fault, the carrier bands scheme is reconfigured and modulation levels of inverter cells are reassigned in this proposed fault-tolerant operation. The proposed strategy performs balanced three-phase line-to-line voltages and line currents when a switching device fault occurs in a cascaded multilevel inverter using LS-PWM. Simulation and experimental results are included in the paper to verify the proposed method.
Keywords
Level-Shifted pulsewidth modulation (PWM) strategies; Fault-tolerance; Multilevel inverters.;
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1 M. Malinowski, K. Gopakumar, J. Rodriguez, and M. A. Perez, "A Survey on Cascaded Multilevel Inverters," IEEE Transactions on Industrial Electronics, vol. 57, no. 7, pp. 2197-2206, Jul. 2010.   DOI   ScienceOn
2 B. Wu, “High-Power Converters and AC Drives,” A John Wiley & Sons, 2006.
3 B. P. McGrath and D. G. Holmes, "Multicarrier PWM strategies for multilevel inverters," IEEE Transactions on Industrial Electronics, vol. 49, no. 4, pp. 858-867, Aug. 2002.   DOI   ScienceOn
4 J. Rodriguez, S. Bernet, B. Wu, J. O. Pontt, and S. Kouro, "Multilevel voltage-source-converter topologies for industrial medium-voltage drives," IEEE Transactions on Industrial Electronics, vol. 54, no. 6, pp. 2930-2945, Dec. 2007.   DOI
5 D. Eaton, J. Rama, and P.W. Hammond, "Neutral Shift," IEEE Industry Applications Magazine, vol. 9, no. 6, pp. 40-49, Nov./Dec. 2003.
6 J. S. Lee, H. W. Sim, and K. B. Lee, "Cascaded H-bridge Multilevel Inverter for Increasing Output Voltage Levels," IEEE CENCON 2014, pp. 365-370, Oct. 2014.
7 W. Song and A. Q. Huang, "Control strategy for fault-tolerant cascaded multilevel converter based STATCOM," IEEE APEC, pp. 1073-1076, Feb./Mar. 2007.
8 H. W. Sim, J. S. Lee, and K. B. Lee, "A Detection Method for an Open-Switch Fault in Cascaded H-bridge Multilevel Inverters," IEEE ECCE 2014, pp. 2101-2106, Sep. 2014.
9 L. Maharjan, T. Yamagishi, H. Akagi, and J. Asakura, "Fault-Tolerant Operation of a Battery-Energy-Storage System Based on a Multilevel Cascade PWM Converter With Star Configuration," IEEE Transactions on Power Electronics, vol. 25, no. 9, pp. 2386-2396, Sep. 2010.   DOI   ScienceOn
10 Y. M. Park, H. S, Lyoo, H. W. Lee, M. G. Jung, S. H. Lee, and J. Y. Yoo, "Unbalanced Three-Phase Control using Offset-Voltage for H-Bridge Multilevel Inverter with Faulty Power Cells," IEEE PESC 2008, pp. 1790-1795, Jun. 2008.
11 M. Ma, L. Hu, A. Chen, and X. He, "Reconfiguration of Carrier-Based Modulation Strategy for Fault Tolerant Multilevel Inverters," IEEE Transactions on Power Electronics, vol. 22, no. 5, pp. 2050-2060, Sep. 2007.   DOI   ScienceOn
12 S. Khomfoi and L. M. Tolbert, "Fault Detection and Reconfiguration Technique for Cascaded H-bridge 11-level Inverter Drives Operating under Faulty Condition," Power Electronics and Drive Systems 7th International Conference, pp. 1035-1042, Nov. 2007.
13 M. Tamasas, M. Saleh, M. Shaker, and A. Hammoda, "Evaluation of Modulation Techniques for 5-Level Inverter Based on Multicarrier Level Shift PWM," IEEE MELECON 2014, pp. 17-23, Apr. 2014.