Influence of zero width period on the AC-side line current harmonics of 5-level MLCR CSC

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

The multi-level current reinjection (MLCR) concept produces high quality line current waveforms in current source converters (CSC) by injecting an reinjection current. Two rein-jected waveforms: Symmetrical waveform and Linear waveform are known. In this paper the influence of varying the zero width period (ZWP) of symmetrical waveform on line current harmonics of self-commutated MLCR CSC is studied. Different ZWPs are used and optimum ZWP is identified. The effect of different ZWP of the linear waveform on the thyristor based MLCR CSC is presented. This paper also investigates the effects of negative firing angle on the THD levels of the line currents drawn by both CSCs using PSCAD/EMTDC.

Keywords

AC-DC power convertors; harmonic distortion; thyristors; 5-level MLCR CSC; AC-DC conversion; AC-side line current harmonics; PSCAD-EMTDC; THD level; ZWP; current source converter; high quality line current waveform; linear waveform; multilevel current reinjection; symmetrical waveform; zero width period influence; Hafnium compounds; Harmonic analysis; Lead; 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.2012.6401306

Filename

6401306