Please use this identifier to cite or link to this item:
Title: Fault Analysis and Non-Redundant Fault Tolerance in 3-Level Double Conversion UPS Systems Using Finite-Control-Set Model Predictive Control
Authors: Caseiro, Luís 
Mendes, André 
Keywords: power electronics; multilevel converters; fault tolerance; model predictive control
Issue Date: 2021
Publisher: MDPI AG
Project: Project SAICT-45-2017-POCI-01-0145-FEDER- 029112—PTDC/ EEI-EEE/29112/2017 
Serial title, monograph or event: Energies
Volume: 14
Issue: 8
Abstract: Fault-tolerance is critical in power electronics, especially in Uninterruptible Power Supplies, given their role in protecting critical loads. Hence, it is crucial to develop fault-tolerant techniques to improve the resilience of these systems. This paper proposes a non-redundant fault-tolerant double conversion uninterruptible power supply based on 3-level converters. The proposed solution can correct open-circuit faults in all semiconductors (IGBTs and diodes) of all converters of the system (including the DC-DC converter), ensuring full-rated post-fault operation. This technique leverages the versatility of Finite-Control-Set Model Predictive Control to implement highly specific fault correction. This type of control enables a conditional exclusion of the switching states affected by each fault, allowing the converter to avoid these states when the fault compromises their output but still use them in all other conditions. Three main types of corrective actions are used: predictive controller adaptations, hardware reconfiguration, and DC bus voltage adjustment. However, highly differentiated corrective actions are taken depending on the fault type and location, maximizing post-fault performance in each case. Faults can be corrected simultaneously in all converters, as well as some combinations of multiple faults in the same converter. Experimental results are presented demonstrating the performance of the proposed solution.
ISSN: 1996-1073
DOI: 10.3390/en14082210
Rights: openAccess
Appears in Collections:I&D IT - Artigos em Revistas Internacionais
FCTUC Eng.Electrotécnica - Artigos em Revistas Internacionais

Show full item record


checked on May 2, 2023

Page view(s)

checked on Sep 18, 2023


checked on Sep 18, 2023

Google ScholarTM




This item is licensed under a Creative Commons License Creative Commons