Title :
A novel control concept for operating a two-stage a-rectifier-based telecommunications power supply module under heavily unbalanced mains voltage conditions
Author :
Miniböck, John ; Greul, Roland ; Kolar, Johann W.
Abstract :
In this paper, a novel control concept for a unity power factor three-phase AC/DC two-stage telecommunications power supply system is proposed. The system is formed by an input-side delta-connection of three single-phase modules with parallel connected DC outputs. The control concept features output voltage control, module load sharing and mains voltage proportional guidance of the input currents and does allow to continue in operation also in case of heavily unbalanced mains voltage condition like those given for a missing mains phase or in case of an earth-fault of a mains phase or for a short circuit between two mains phases
Keywords :
AC-DC power convertors; electric current control; harmonic distortion; power conversion harmonics; rectifying circuits; telecommunication power supplies; voltage control; fault-tolerant operation; input-side delta-connection; mains voltage; module load sharing; output voltage control; parallel connected DC outputs; proportional input current guidance; three-phase AC/DC two-stage telecommunications power supply; unbalanced mains voltage condition; unity power factor; Circuits; Communication system control; Control systems; Energy management; Power electronics; Power supplies; Reactive power; Rectifiers; Telecommunication control; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2002. APEC 2002. Seventeenth Annual IEEE
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-7404-5
DOI :
10.1109/APEC.2002.989324
