Title :
A transformerless D-STATCOM based on a multi-voltage cascade converter requiring no DC sources
Author :
Sano, Kenichiro ; Takasaki, Masahiro
Author_Institution :
Syst. Eng. Res. Lab., Central Res. Inst. of Electr. Power Ind., Komae, Japan
Abstract :
This paper deals with a cascaded multilevel converter which has multiple dc voltage values (multi-voltage cascade converter) for a 6.6-kV transformerless distribution static synchronous compensator (D-STATCOM). A control method is proposed to realize dc voltage regulation of series-connected three cells in the STATCOM operation, making it possible to remove dc sources from all H-bridge cells. The simplified configuration without the dc sources makes the STATCOM small and lightweight. A downscaled STATCOM model rated at 220 V and 10 kVA is built and a series of verification tests is executed. Theoretical analysis and experimental results prove the stable operating performance of the proposed method.
Keywords :
power convertors; static VAr compensators; cascaded multilevel converter; control method; dc voltage regulation; multivoltage cascade converter; series-connected three cells; transformerless D-STATCOM; transformerless distribution static synchronous compensator; Automatic voltage control; Capacitors; Current control; Energy exchange; Power supplies; Pulse width modulation; Cascade converter; STATCOM; dc voltage control; silicon carbide device; transformerless converter;
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2011 IEEE
Conference_Location :
Phoenix, AZ
Print_ISBN :
978-1-4577-0542-7
DOI :
10.1109/ECCE.2011.6064193
