Real-Time Fault Detection to Ensure the Safe Operation of the Single-Phase Five-Level VIENNA Rectifier

Pham Thi Thuy Linh, Nguyen Ngoc Bach, Vu Minh Phap and Doan Van Binh
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Pham Thi Thuy Linh: Faculty of Control and Automation, Electric Power University, Hanoi 100000, Vietnam
Nguyen Ngoc Bach: Institute of Energy Science, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
Vu Minh Phap: Institute of Energy Science, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
Doan Van Binh: Institute of Energy Science, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam

Energies, 2021, vol. 14, issue 24, 1-20

Abstract: This work aims to explore and evaluate the nonreversible AC/DC five-level structure from the point of view of its operational safety: high electrical security on internal destruction and continuity in operation. It only has low-voltage monotransistor cells (Si and SiC 600 V max) and is intrinsically tolerant to imperfection control and parasites, therefore naturally secure. The design and lab-test of fault monitoring and fault diagnosis with just one voltage sensor of a single-phase five-level VIENNA rectifier were proposed. This real-time diagnostic method allows for a safe stop or corrective control strategy based on the reconfiguration of the modulation. The reconstruction strategy allows for optimization of the current and voltage signals as well as power factor. A continuous post-fault operation can be achieved for critical applications. An experimental prototype 3 kW/230 VAC/800 VDC/32 kHz was created to validate the proposed fault diagnosis method and reconfiguration control method.

Keywords: five-level active VIENNA rectifier; short-circuit fault (SCF) type; diagnosis; fault-tolerant (FT) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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