DocumentCode :
2117921
Title :
Voltage fluctuation suppression method of floating capacitors in a new modular multilevel converter
Author :
Wang, Kui ; Li, Yongdong ; Zheng, Zedong ; Xu, Lie
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., Beijing, China
fYear :
2011
fDate :
17-22 Sept. 2011
Firstpage :
2072
Lastpage :
2078
Abstract :
Modular multilevel converter (MMC) is a newly emerging multilevel topology for high power applications in recent years. The voltage fluctuation problem of a new MMC topology is studied in this paper. In order to suppress the voltage fluctuation of the floating capacitors, a control method is proposed by injecting high frequency zero-sequence voltage and phase-to-phase circulating currents. It can be used to drive an induction motor with pump/blower-like load at low speed and improve the performance significantly. A low power three-phase five-level prototype is built up to validate this method.
Keywords :
induction motors; power capacitors; power convertors; control method; floating capacitors; high frequency zero-sequence voltage; high power applications; induction motor; low power three-phase five-level prototype; modular multilevel converter; multilevel topology; phase-to-phase circulating currents; pump-blower-like load; voltage fluctuation suppression method; Bridge circuits; Capacitors; Fluctuations; Frequency modulation; Time frequency analysis; Voltage control; Voltage fluctuations;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2011 IEEE
Conference_Location :
Phoenix, AZ
Print_ISBN :
978-1-4577-0542-7
Type :
conf
DOI :
10.1109/ECCE.2011.6064042
Filename :
6064042
Link To Document :
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