Open-Switch Fault-Tolerant Operation of T-Type Active Neutral-Point-Clamped Converter Using Level-Shifted PWM
The T-type active neutral-point-clamped (T-ANPC) converter is an emerging hybrid multilevel topology, which owns superior characteristics such as low conduction losses, flexible in control. Reliability improvement is essential for the T-ANPC due to the large number of power switches. For this motiva...
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| Veröffentlicht in: | IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2021-07, Vol.68 (7), p.2598-2602 |
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| creator | Xu, Shuai Sun, Zhenyao Yao, Chunxing Liu, Kang Ma, Guangtong |
| description | The T-type active neutral-point-clamped (T-ANPC) converter is an emerging hybrid multilevel topology, which owns superior characteristics such as low conduction losses, flexible in control. Reliability improvement is essential for the T-ANPC due to the large number of power switches. For this motivation, this brief develops a carrier-based fault-tolerant control strategy for the T-ANPC converter in the case of typical open-switch faults. A modified level-shifted pulse width modulation (LS-PWM) is employed to control the converter to obtain the desired outputs under single/multiple open-switch fault modes. The fault-tolerant operations with full and reduced power ratings are realized by rearranging the carriers and modulation signals of the LS-PWM. Finally, the feasibility and effectiveness of the proposed control strategy for the T-ANPC is evaluated experimentally. |
| doi_str_mv | 10.1109/TCSII.2021.3061483 |
| format | Article |
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| subjects | Active neutral-point-clamped converter Circuit faults Clamping Conduction losses Converters Fault tolerance Fault tolerant systems Multilevel converters open-switch Pulse duration modulation Pulse width modulation Switches Topology voltage balancing control |
| title | Open-Switch Fault-Tolerant Operation of T-Type Active Neutral-Point-Clamped Converter Using Level-Shifted PWM |
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