Paper Info
Title
A Fault-Diagnosis And Fault-Tolerant Control Scheme For Flying Capacitor Multilevel Inverters
Abstract
The high number of power semiconductors in multilevel converters makes them susceptible to failure. Therefore, one of the main concerns in utilizing multilevel inverters is their reliability. This paper proposes a new simple fault-diagnosis and fault-handling method to increase the robustness and reliability of a flying capacitor multilevel inverter (FCMLI) which is one of the most prominent multilevel inverters. The proposed method is capable of diagnosing failed switch(es) and reconfiguring the switching sequence such that the output voltage is maintained similar to a normal operation condition. The proposed scheme identifies failed switch(es) by using the information about the charging state of the capacitors and the applied switching sequence. After identifying the failed switch(es), the algorithm bypasses the failed switch(es) and converts the control signals of the faulty leg from an M-cell L-level configuration to an (M-F)-cell L-level configuration (where F is the number of failed switches). The most attractive feature of the proposed control scheme is that any number of failed switches can be tolerated, as long as the number of functional switches is higher than the minimum number of cells required to build a full-binary L-level FCMLI. Simulation and experimental results are presented that verify the effectiveness of the proposed method.
Year
DOI
Venue
2017
10.1109/TIE.2016.2624722
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Keywords
Field
DocType
Fault detection, flying capacitor, multilevel inverters, reliability
Capacitor,Control theory,Power semiconductor device,Voltage,Converters,Robustness (computer science),Control engineering,Flying capacitor,Fault tolerance,Engineering,Multilevel inverter
Journal
Volume
Issue
ISSN
64
3
0278-0046
Citations 
PageRank 
References 
4
0.72
6
Authors
2
Name
Order
Citations
PageRank
Jalal Amini171.27
Mehrdad Moallem213427.70