Title :
A novel voltage balancing modulation scheme used in cascaded H-bridge multilevel STATCOMs
Author :
Yang Rong-feng ; Chen He ; Sui Sun-ke ; Yu Yong ; Xu Dian-Guo
Author_Institution :
Sch. of Electr. Eng. & Autom., Harbin Inst. of Technol., Harbin, China
Abstract :
This paper presents a novel voltage balancing modulation scheme based on the popular PSC-PWM strategy for cascaded multilevel STATCOMs. Analyzing on adjustments of the carriers in PSC-PWM, the proposed method more flexibly balances the DC-voltages from the charging process, and has no requirements for extra circuits or PI controllers. Finally, a 25-level cascaded STATCOM is constructed and tested. The proposed method solves the DC-voltage balancing problems that usually arise in the cascaded multilevel STATCOM operations, and its features and superiority are demonstrated.
Keywords :
pulse width modulation; static VAr compensators; 25-level cascaded STATCOM; DC voltage balancing modulation scheme; PSC-PWM strategy; cascaded H-bridge multilevel STATCOM; charging process; Automatic voltage control; Automation; cascaded H-bridge STATCOM; multilevel converter; voltage balancing control;
Conference_Titel :
ECCE Asia Downunder (ECCE Asia), 2013 IEEE
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4799-0483-9
DOI :
10.1109/ECCE-Asia.2013.6579198
