Title :
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
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;
Conference_Titel :
Electrical and Computer Engineering, 1999 IEEE Canadian Conference on
Conference_Location :
Edmonton, Alberta, Canada
Print_ISBN :
0-7803-5579-2
DOI :
10.1109/CCECE.1999.804867
