DocumentCode
3497311
Title
Study on neutral-point voltage balance of 3-level NPC inverter in 3-phase 4-wire system
Author
Zhang, Wenping ; Li, Xiao ; Du, Chengrui ; Wu, Xiaotian ; Shen, Guoqiao ; Xu, Dehong
Author_Institution
Dept. of Electr. Eng., Zhejiang Univ., Hangzhou, China
fYear
2010
fDate
16-18 June 2010
Firstpage
878
Lastpage
882
Abstract
Problem of neutral-point voltage unbalance is a key issue for 3-phase 4-wire 3-level NPC inverter. This paper analyzes the relationship between the neutral point voltage and the neutral point current. Neutral-point voltage problem is transformed into neutral-point current problem. Then value of neutral-point current under balanced and unbalanced load condition is calculated. According to the mathematical analysis, a neutral point voltage control strategy is investigated. The simulation and experimental results verify control method.
Keywords
Capacitors; Converters; Fluctuations; Inverters; Mathematical model; Modulation; Voltage control; 3-level; 3-phase 4-wire; neutral-point voltage;
fLanguage
English
Publisher
ieee
Conference_Titel
Power Electronics for Distributed Generation Systems (PEDG), 2010 2nd IEEE International Symposium on
Conference_Location
Hefei, China
Print_ISBN
978-1-4244-5669-7
Type
conf
DOI
10.1109/PEDG.2010.5545910
Filename
5545910
Link To Document