m-level thyristor based MLCR CSC: A comparative study

Author

Das, Bishnu Prasad ; Watson, Neville R. ; Liu, Yanbing

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Canterbury, Christchurch, New Zealand

fYear

2012

fDate

Oct. 30 2012-Nov. 2 2012

Firstpage

1

Lastpage

6

Abstract

Multi-level Current Reinjection (MLCR) concept adds self commutation capability to thyristors, and produces a high quality line current waveforms and provides reactive power compensation in current source converters (CSC). Multi-level conversion is applied to generate the required optimum linear multilevel injection current which, when reinjected to the ac side, reduces the line current total harmonic distortion (THD) and forces the thyristor current to be zero. In this paper a comparative study is carried out for a 3-level, 5-level, and 7-level thyristor based MLCR CSC in terms of line current THD obtained, reinjection transformer requirements, reinjection switch ratings, and reinjection control circuitry complexities. Extensive PSCAD/EMTDC simulations are presented for comparing the different m-level reinjection schemes.

Keywords

harmonic distortion; power convertors; thyristors; transformers; 3-level thyristor; 5-level thyristor; 7-level thyristor; PSCAD/EMTDC simulations; THD; comparative study; current source converters; high quality line current waveforms; m-level thyristor based MLCR CSC; multilevel current reinjection; reinjection control circuitry complexities; reinjection transformer; self commutation capability; total harmonic distortion; Harmonic analysis; Lead; PSCAD; AC-DC conversion; current source conversion; harmonics;

fLanguage

English

Publisher

ieee

Conference_Titel

Power System Technology (POWERCON), 2012 IEEE International Conference on

Conference_Location

Auckland

Print_ISBN

978-1-4673-2868-5

Type

conf

DOI

10.1109/PowerCon.2012.6401300

Filename

6401300