Title :
Research on a novel hybrid cascade multilevel converter
Author :
Xu, Yun ; Zou, Yunping
Author_Institution :
Dept. of Electr. & Electron. Eng., Huazhong Univ. of Sci. & Technol., Wuhan
Abstract :
This paper proposed a novel hybrid cascade multilevel converter in which a Neutral-Point-Clamped (NPC) converter and several identical H-Bridge converters with equal dc bus voltage are series connected to form a converter phase leg. Accordingly, for the novel converter a hybrid modulation method which incorporates square-wave synthesis in conjunction with triangle carried-based PWM method is employed. For the NPC converter, the neutral-point balance problem is analyzed and solved by a Bang-Bang control method. Digital controller design which is the parallel connection of PD control and repetitive control is presented. Simulation and experiment results are provided.
Keywords :
PD control; PWM power convertors; bang-bang control; H-bridge converters; PWM method; bang-bang control method; dc bus voltage; digital controller; hybrid modulation method; multilevel converter; neutral-point-clamped converter; repetitive PD control; square-wave synthesis; Power engineering; Cascade; Hybrid Modulation; Multilevel; Repetitive PD Control; The High Power; three-level;
Conference_Titel :
Power Engineering Conference, 2007. IPEC 2007. International
Conference_Location :
Singapore
Print_ISBN :
978-981-05-9423-7
