VSC-HVDC system based on hybrid multilevel voltage sourced converters

This paper researches the application of hybrid multilevel converters (HMC) in the VSC-HVDC system. First, the circuit configuration and working principle are introduced. Then the conditions about capacitor voltage balancing of each sub-module are analyzed from the power perspective. A basic control...

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Bibliographic Details
Published inDianli Xitong Baohu yu Kongzhi Vol. 41; no. 10; pp. 33 - 38
Main Authors Hu, Peng-Fei, Jiang, Dao-Zhuo, Guo, Jie, Zhou, Yue-Bin, Lin, Zhi-Yong, Liang, Yi-Qiao
Format Journal Article
LanguageChinese
Published 16.05.2013
Subjects
Active control
Circuits
Converters
Decoupling
Electric potential
Multilevel
Strategy
Voltage
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Summary:This paper researches the application of hybrid multilevel converters (HMC) in the VSC-HVDC system. First, the circuit configuration and working principle are introduced. Then the conditions about capacitor voltage balancing of each sub-module are analyzed from the power perspective. A basic control strategy of converters is introduced. An advanced control strategy of converters and a voltage-balancing scheme are proposed. Feed forward cross decoupling control strategies based on the HMC are used to design the controller which includes decoupling control of active power and reactive power, and the DC voltage control. Finally, a two terminals, three phases, 35 kV, 240 sub-modules VSC-HVDC detailed simulation model is built based on PSCAD/EMTDC. The principle of the main circuit and the control strategies are verified.
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ISSN:1674-3415