Title :
Research on submodule capacitance voltage balancing of MMC based on carrier phase shifted SPWM technique
Author :
Zhao, Xin ; Li, Guangkai ; Zhao, Chengyong
Author_Institution :
Key Lab. of Power Syst. Protection & Dynamic Security Monitoring & Control under Minist. of Educ., North China Electr. Power Univ., Baoding, China
Abstract :
Modular multilevel converter (MMC) is a new multilevel converter suitable for VSC-HVDC. The principle of the submodules and converter topology are introduced in this paper. A novel carried phase shifted sinusoidal pulse width modulation (CPS-SPWM) scheme suitable for MMC in VSC-HVDC is presented. Voltage balancing among the submodules is a crucial problem of MMC. Based on the energy equipartition and voltage balance, a capacitor voltage-balancing strategy is presented in this paper with the topology of MMC and modulation. This scheme could effectively ensure each submodule at the same capacitor voltage level. The correctness and effectiveness of the schemes were verified by the simulation.
Keywords :
HVDC power convertors; PWM power convertors; power capacitors; MMC; VSC-HVDC; capacitor voltage level; capacitor voltage-balancing strategy; carried phase shifted sinusoidal pulse width modulation scheme; carrier phase shifted SPWM technique; converter topology; energy equipartition; modular multilevel converter; submodule capacitance voltage balancing; EMTDC; Face; Frequency modulation; Rectifiers; Switches; Valves; Variable speed drives; capacitance voltage balancing; carrier phase-shifted sinusoidal pulse width modulation technique; circulating current; high voltage direct current transmission; modular multilevel converter;
Conference_Titel :
Electricity Distribution (CICED), 2010 China International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4577-0066-8
