Title :
Problems and solutions associated with the operation of phase-controlled rectifiers under unbalanced input voltage conditions
Author :
Maswood, A. ; Joos, G. ; Ziogas, P. ; Lindsay, J.
Author_Institution :
Dept. of Electr. Eng., Concordia Univ., Montreal, Que., Canada
Abstract :
The effect of input voltage unbalances on the rectifier input current and on the filter kilovoltampere rating is analyzed. The effect of voltage unbalance on the rectifier output voltage is also examined. A practical solution is proposed for the elimination of the triplen input current harmonics. It is shown that the elimination of these noncharacteristic harmonics can be accomplished by using the equidistant firing scheme. This scheme results in equal thyristor conduction periods irrespective of the degree of unbalance in input voltages.<>
Keywords :
harmonics; rectifiers; thyristor applications; equidistant firing scheme; filter kilovoltampere rating; harmonics; input current; output voltage; phase-controlled rectifiers; thyristor conduction periods; unbalanced input voltage; Capacitors; Costs; Frequency; Impedance; Inductors; Power harmonic filters; Power system harmonics; Rectifiers; Shunt (electrical); Voltage;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1990. APEC '90, Conference Proceedings 1990., Fifth Annual
Conference_Location :
Los Angeles, CA, USA
DOI :
10.1109/APEC.1990.66431
