Review of fault diagnosis and fault-tolerant control for modular multilevel converter of HVDC

Author

Hui Liu ; Poh Chiang Loh ; Blaabjerg, Frede

Author_Institution

Dept. of Energy Technol., Aalborg Univ., Aalborg, Denmark

fYear

2013

fDate

10-13 Nov. 2013

Firstpage

1242

Lastpage

1247

Abstract

This review focuses on faults in Modular Multilevel Converter (MMC) for use in high voltage direct current (HVDC) systems by analyzing the vulnerable spots and failure mechanism from device to system and illustrating the control & protection methods under failure condition. At the beginning, several typical topologies of MMC-HVDC systems are presented. Then fault types such as capacitor voltage unbalance, unbalance between upper and lower arm voltage are analyzed and the corresponding fault detection and diagnosis approaches are explained. In addition, more attention is dedicated to control strategies, when running in MMC faults or grid faults. This paper ends up with a discussion of other opportunities for future development.

Keywords

HVDC power convertors; electric current control; fault diagnosis; fault tolerant control; voltage control; MMC-HVDC system; capacitor voltage unbalance; failure mechanism; fault detection; fault diagnosis; fault-tolerant control; grid fault; high voltage direct current system; lower arm voltage analysis; modular multilevel converter; upper arm voltage analysis; Capacitors; Circuit faults; Fault diagnosis; Fault tolerance; Switches; Topology; Voltage control; Fault Diagnosis; Fault-tolerant Control; High Voltage Direct Current; Modular Multilevel Converter;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics Society, IECON 2013 - 39th Annual Conference of the IEEE

Conference_Location

Vienna

ISSN

1553-572X

Type

conf

DOI

10.1109/IECON.2013.6699310

Filename

6699310