Control of transformerless MMC-HVDC during asymmetric grid faults

Author

Timofejevs, Artjoms ; Gamboa, Daniel ; Liserre, Marco ; Teodorescu, Remus ; Chaudhary, Sanjay K.

Author_Institution

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

fYear

2013

fDate

10-13 Nov. 2013

Firstpage

2016

Lastpage

2021

Abstract

Modular multilevel converter (MMC) is the latest converter topology suitable for the transformerless applications in HVDC transmission. HVDC systems are required to remain connected during grid faults, provide grid support and completely decouple the healthy side from the faulty one. The MMC converter weak points are challenged by this particular condition and by these demands. This paper demonstrates the effect of negative and zero sequence current control in MMC-HVDC during asymmetric grid faults. A current limitation strategy for MMC is derived and verified through simulations.

Keywords

HVDC power convertors; HVDC power transmission; electric current control; power grids; HVDC systems; HVDC transmission; MMC converter; asymmetric grid faults; current control; modular multilevel converter; transformerless MMC-HVDC control; Capacitors; Current control; HVDC transmission; Oscillators; Reactive power; Topology; Voltage control; HVDC; Modular Multilevel Converter (MMC); unbalanced faults;

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.2013.6699441

Filename

6699441