Optimization of soft-switched flying capacitor multi-level converters applied to STATCOMs

Author

Fujii, Kansuke ; De Doncker, Rik W.

Author_Institution

Fuji Electr. Adv. Technol., Hyogo

fYear

2007

fDate

2-5 Sept. 2007

Firstpage

1

Lastpage

10

Abstract

To realize high power density and cost effective STATCOMs, transformer-less and filter-less designs are desirable. In this paper, a Flying Capacitor Multi-level (FCML) converter is selected and designed for a 6.6 kV five-level STATCOM. To decrease size of the flying capacitor by increasing a switching frequency, the Auxiliary Resonant Commutated Pole (ARCP) Converter is used, and their parameters are optimized based on loss-implemented simulation. In addition, effect of voltage ripple upon switching energy is discussed, and difference between hard-switched converter and ARCP converter is presented. Finally, the total losses and costs of the hard-switched and soft-switched five-level FCML converter is compared.

Keywords

capacitors; static VAr compensators; switching convertors; STATCOM; auxiliary resonant commutated pole converter; filter-less design; flying capacitor multilevel converter; hard switched converter; high power density; soft-switched five-level converter; transformer-less design; voltage 6.6 kV; Automatic voltage control; Capacitors; Circuit simulation; Costs; Resonance; Switches; Switching circuits; Switching converters; Switching frequency; Transformers; Multilevel converters; STATCOM; Soft switching; ZCZVS Converter;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications, 2007 European Conference on

Conference_Location

Aalborg

Print_ISBN

978-92-75815-10-8

Electronic_ISBN

978-92-75815-10-8

Type

conf

DOI

10.1109/EPE.2007.4417402

Filename

4417402