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Ali_Topcu_MasterThesis _Final.pdf (3.03 MB)

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Multiple Devices Open Circuit Fault Diagnosis for Multilevel Inverters

Topcu, Ali
http://rave.ohiolink.edu/etdc/view?acc_num=akron1603745813645294

Abstract Details

2020, Master of Science, University of Akron, Electrical Engineering.
This thesis presents a new fault detection and localization (FDL) algorithm for three-level multilevel inverters which helps identify faulty switch(es) in the case of open-circuit failure of power devices. This new algorithm contributes to existing methods by being able to identify both multiple single-phase and multiphase failures. Further, this method does not require any extra sensors or redundant circuitry. Based on an analysis of the output phase currents, the new proposed algorithm benefits from the fundamentals of the so-called Average Current Park Vector (ACPV) method which pinpoints only a single failure in a single phase. ACPV defines “error values” and “average current value” as diagnosis parameters to give an idea about a single failure. The new FDL method defines “phase angle” as a third diagnosis parameter and interprets the other two parameters more efficiently to find faulty switches. The proposed FDL algorithm can be carried out in three steps. In the first step, error values are utilized to determine whether a single-phase or a multiphase failure has occurred. In the second step, the error and average current values are compared to those in a predefined lookup table which comprises threshold values for every single case. In the final and third step, the phase angle is used to determine and locate multiphase failures, with the help of the other two parameters. The FDL algorithm is successfully simulated by considering different scenarios. Additionally, a prototype board is developed, and an experiment is conducted with a real-time interface module. Simulation results and experimental results are highly correlated
Yilmaz Sozer, PhD (Advisor)
J. Alexis De Abreu Garcia, PhD (Committee Member)
Jin Kocsis, PhD (Committee Member)
87 p.
Electrical Engineering
Multilevel inverters, Fault Diagnosis, T-Type, NPC, Average Current Park Vector

Recommended Citations

Citations

  • Topcu, A. (2020). Multiple Devices Open Circuit Fault Diagnosis for Multilevel Inverters [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1603745813645294

    APA Style (7th edition)

  • Topcu, Ali. Multiple Devices Open Circuit Fault Diagnosis for Multilevel Inverters. 2020. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1603745813645294.

    MLA Style (8th edition)

  • Topcu, Ali. "Multiple Devices Open Circuit Fault Diagnosis for Multilevel Inverters." Master's thesis, University of Akron, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron1603745813645294

    Chicago Manual of Style (17th edition)

akron1603745813645294
513
© 2020, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.
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