DocumentCode :
829290
Title :
High dynamic control of a three-level voltage-source-converter drive for a main strip mill
Author :
Böcker, Joachim ; Janning, Jörg ; Jebenstreit, Helmut
Author_Institution :
Am Brandpfuhl 8W, Berlin, Germany
Volume :
49
Issue :
5
fYear :
2002
fDate :
10/1/2002 12:00:00 AM
Firstpage :
1081
Lastpage :
1092
Abstract :
A high dynamic control system for the Alspa VDM 7000 medium-voltage drive was implemented, which provides fast torque response times of a few milliseconds despite the typically low switching frequency of gate-turn-off thyristors which is necessary to achieve high efficiency. The drive system consists of a three-level voltage-source converter with active front end and a synchronous motor. The drive has most recently been applied to a main strip mill. It provides a maximum of 8.3-MW mechanical power with a rated motor voltage of 3 kV. Besides motor torque as the main control objective, the control system has to comply with a number of additional objectives and constraints like DC-link voltage regulation and balancing, current and torque harmonics, motor flux, and excitation.
Keywords :
DC-AC power convertors; invertors; machine vector control; rolling mills; steel industry; switching circuits; synchronous motor drives; thyristor convertors; torque control; 3 kV; 8.3 MW; DC-link voltage balancing; DC-link voltage regulation; control objective; current harmonics; efficiency; excitation; gate-turn-off thyristors; high dynamic control system; mechanical power; medium-voltage drive; motor flux; motor voltage; strip mill; switching frequency; synchronous motor; three-level voltage-source converter; torque harmonics; Control systems; Delay; Medium voltage; Milling machines; Strips; Switching frequency; Synchronous motors; Thyristors; Torque control; Voltage control;
fLanguage :
English
Journal_Title :
Industrial Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0278-0046
Type :
jour
DOI :
10.1109/TIE.2002.803220
Filename :
1036803
Link To Document :
بازگشت