The analysis and experiment of dc-link short-circuit of modular multilevel converter based high voltage direct current system

Author

Zhandong Sun ; Fanqiang Gao ; Zixin Li ; Yongjie Luo ; Ping Wang ; Yaohua Li ; Xiaoping Yang ; Ruifeng Gou

Author_Institution

Key Lab. of Power Electron. & Electr.Drive, Inst. of Electr. Eng., Beijing, China

fYear

2014

fDate

9-11 June 2014

Firstpage

1287

Lastpage

1291

Abstract

The dc-link pole to pole short circuit is one of the most serious fault of a modular multilevel converter. Because of this, it is also one of the most important research objects for institutes and companies. However, there are not so many papers about this experiment published yet. Actually, the short circuit current before blocking the sub modules is the combination of the ac injection current and the capacitor discharge current. This paper analyzes the model of the capacitor discharging circuit and demonstrates the results of the experiment done with a ±10 kV prototype MMC.

Keywords

HVDC power convertors; equivalent circuits; short-circuit currents; AC injection current; DC link short-circuit; capacitor discharging circuit; high voltage direct current system; modular multilevel converter; short circuit current; voltage -10 kV to 10 kV; Capacitors; Converters; Discharges (electric); Insulated gate bipolar transistors; Integrated circuit modeling; Prototypes; Thyristors; HVDC; Modular multilevel converter; dc-link pole to pole short circuit;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics and Applications (ICIEA), 2014 IEEE 9th Conference on

Conference_Location

Hangzhou

Print_ISBN

978-1-4799-4316-6

Type

conf

DOI

10.1109/ICIEA.2014.6931366

Filename

6931366