A Modified Level-Shifted PWM Strategy for Fault-Tolerant Cascaded Multilevel Inverters With Improved Power Distribution
In: IEEE Transactions on Industrial Electronics, Jg. 63 (2016-11-01), S. 7264-7274
Online
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Zugriff:
To increase the fault tolerance for cascaded H-bridge multilevel inverters (CHMIs) based on level-shifted pulse width modulation (LS-PWM), a modified LS-PWM method is proposed for the inverters operating under faulty conditions. To cover both open- and short-device fault cases, two types of switching scheme are included in this PWM method. With this PWM method, the neutral shift can be applied as fault-tolerant control for CHMIs based on LS-PWM. Finally, three-phase-balanced line-to-line voltages and currents with minimum harmonic distortion are produced for the inverter with disabled power cells. In addition, this LS-PWM method has the capability to improve power distribution among the H-bridge power cells under the faulty conditions. Simulation and experimental results show that the proposed PWM method performs satisfactorily to achieve fault tolerance.
Titel: |
A Modified Level-Shifted PWM Strategy for Fault-Tolerant Cascaded Multilevel Inverters With Improved Power Distribution
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Autor/in / Beteiligte Person: | Lee, June-Seok ; Kim, Seok-Min ; Lee, Kyo-Beum |
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Zeitschrift: | IEEE Transactions on Industrial Electronics, Jg. 63 (2016-11-01), S. 7264-7274 |
Veröffentlichung: | Institute of Electrical and Electronics Engineers (IEEE), 2016 |
Medientyp: | unknown |
ISSN: | 1557-9948 (print) ; 0278-0046 (print) |
DOI: | 10.1109/tie.2016.2547917 |
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