Title :
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
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;
Conference_Titel :
Industrial Electronics and Applications (ICIEA), 2014 IEEE 9th Conference on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4799-4316-6
DOI :
10.1109/ICIEA.2014.6931366
