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Abstract
This paper proposes a new diagnosis method of an open-switch fault and fault-tolerant control strategy for T-type three-level inverter systems. The location of faulty switch can be identified by the average of normalized phase current and the change of the neutral-point voltage. The proposed fault-tolerant strategy is explained by dividing into two cases: the faulty condition of half-bridge switches and the neutral-point switches. The performance of the T-type inverter system improves considerably by the proposed fault tolerant algorithm when a switch fails. The roposed method does not require additional components and complex calculations. Simulation and experimental results verify the feasibility of the proposed fault diagnosis and fault-tolerant control strategy.
Original language | English |
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Journal | I E E E Transactions on Industry Applications |
Volume | 50 |
Issue number | 1 |
Pages (from-to) | 495-508 |
Number of pages | 14 |
ISSN | 0093-9994 |
DOIs | |
Publication status | Published - Jan 2014 |
Keywords
- Multilevel
- T-type inverter
- Fault-tolerance
- Open-switch fault
- Reliability
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Center Of Reliable Power Electronics (CORPE)
Blaabjerg, F., Munk-Nielsen, S., Pedersen, K. & Popok, V.
01/04/2011 → 31/12/2016
Project: Research