Title :
A novel DC charging strategy for modular multilevel converter in a HVDC system
Author :
Sun Zhandong ; Li Yaohua ; Wang Ping ; Chu Zunfang ; Li Zixin ; Gao Fanqiang ; Xu Fei ; Luo Yongjie
Author_Institution :
Key Lab. of Power Electron. & Electr. Drive, Inst. of Electr. Eng., Beijing, China
fDate :
Aug. 31 2014-Sept. 3 2014
Abstract :
The pre-charge process is one crucial step of the operating for modular multilevel converters. Improper charging strategy may damage sub-modules due to capacitor voltage unbalance, or cause tripping operation of the whole system due to leg current overflowing. Thus, it is important to analyze the charging strategy and charging current suppressing method before designing the controller of modular multilevel converter. In this work, a novel DC-link charging strategy is proposed. Experiments results have been demonstrated to verify the validity of the proposed strategy.
Keywords :
HVDC power convertors; DC charging strategy; HVDC system; capacitor voltage unbalance; charging current suppressing method; leg current overflowing; modular multilevel converter; Capacitors; Converters; Equations; Insulated gate bipolar transistors; Inverters; Modulation; Voltage control; DC Charging Strategy; High Voltage Direct Current (HVDC); Modular Multilevel Converter (MMC);
Conference_Titel :
Transportation Electrification Asia-Pacific (ITEC Asia-Pacific), 2014 IEEE Conference and Expo
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-4240-4
DOI :
10.1109/ITEC-AP.2014.6940867
