A fault-tolerant strategy for three-phase dual active bridge converter

Davoodi, A ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1109/PEDSTC.2019.8697835
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2019
  4. Abstract:
  5. Due to several advantages, three-phase Dual Active Bridge (DAB) converter is widely used in numerous applications nowadays. On the other hand, this converter is very vulnerable to Transistor Open-Circuit Fault (TOCF). Therefore, a fault-tolerant (FT) scheme has been proposed in this paper to solve the problem. First, normal and faulty conditions are investigated, and according to the results, a fault-diagnosis (FD) approach is introduced. Using the outcomes of FD unit, a new post-fault strategy is proposed for the converter. The FD method is based on the DC component of transformer phase currents, and the basis of FT technique is shedding the faulty phase. Some benefits of the proposed scheme are preventing the shut-down of the system, no overvoltage or overcurrent, no additional power components, and insensitivity to operational conditions. Simulation results are also provided to confirm the analyses, and evaluate the performance of the proposed scheme. © 2019 IEEE
  6. Keywords:
  7. Fault-Diagnosis ; Index Terms - Fault-Tolerant Converters ; Transistor Open-Circuit Fault ; DC transformers ; Failure analysis ; Fault detection ; Fault tolerance ; Finite difference method ; Power electronics ; Dual active bridge converter ; Dual active bridges ; Fault-tolerant converters ; Fault-tolerant strategy ; Faulty condition ; Open circuit faults ; Operational conditions ; Power components ; Power converters
  8. Source: 10th International Power Electronics, Drive Systems and Technologies Conference, PEDSTC 2019, 12 February 2019 through 14 February 2019 ; 2019 , Pages 253-258 ; 9781538692547 (ISBN)
  9. URL: https://ieeexplore.ieee.org/abstract/document/8697835