Title :
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
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;
Conference_Titel :
Industrial Electronics Society, IECON 2013 - 39th Annual Conference of the IEEE
Conference_Location :
Vienna
DOI :
10.1109/IECON.2013.6699310
