Analysis of the performances of thyristor rectifiers in an unbalanced regime

Author

Ngandui, E. ; Olivier, G.

Author_Institution

Dept. de Genie Electr., Quebec Univ., Trois-Rivieres, Que., Canada

Volume

3

fYear

1999

fDate

9-12 May 1999

Firstpage

1234

Abstract

The three-phase thyristor rectifiers generate harmonics on the AC network side as as well as on the direct current load. Their performances degrade when functioning under nonideal conditions, in particular when the network voltages are unbalanced. In this article, the performance parameters such as power factor, rate of individual and global harmonic distortion of 6 and 12 phase rectifiers are examined under different unbalanced voltage and load conditions in order to compare the harmonic perturbations created by the different converters. The algebraic expressions of the harmonics are established with the aid of commutation functions.

Keywords

commutation; harmonic distortion; power conversion harmonics; power factor; rectifying circuits; thyristor convertors; 12 phase rectifiers; 6 phase rectifiers; algebraic expressions; commutation functions; direct current load; global harmonic distortion; harmonic perturbations; harmonics generation; nonideal conditions; performance parameters; power factor; three-phase thyristor rectifiers; thyristor rectifiers; unbalanced regime; AC generators; DC generators; Degradation; Harmonic distortion; Performance analysis; Power system harmonics; Reactive power; Rectifiers; Thyristors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 1999 IEEE Canadian Conference on

Conference_Location

Edmonton, Alberta, Canada

ISSN

0840-7789

Print_ISBN

0-7803-5579-2

Type

conf

DOI

10.1109/CCECE.1999.804867

Filename

804867