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Title
Japanese: 
English:A transformerless D-STATCOM based on a multivoltage cascade converter requiring no DC sources 
Author
Japanese: Kenichiro Sano, Masahiro Takasaki.  
English: Kenichiro Sano, Masahiro Takasaki.  
Language English 
Journal/Book name
Japanese: 
English:IEEE transactions on power electronics 
Volume, Number, Page Vol. 27    No. 6    pp. 2783-2795
Published date Nov. 3, 2011 
Publisher
Japanese: 
English:IEEE 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
File
Official URL https://ieeexplore.ieee.org/document/6069604/
 
DOI https://doi.org/10.1109/TPEL.2011.2174383
Abstract This paper deals with a cascaded multilevel converter which has multiple dc voltage values (multivoltage cascade converter or hybrid multilevel 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 multiple 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 in steady states and transient states.

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