| |
Enhanced torque control in a DFIG connected to a DC grid by a diode rectifier
| [View]
[Download]
|
| Author(s) |
Matteo IACCHETTI, Gil MARQUES |
| Abstract |
This paper considers the control of a doubly fed induction machine (DFIG) connected to a dc-bus ordc-grid by using a diode rectifier placed on the stator-side and a single PWM converter on the rotor. Inthis system, the torque and the frequency have to be regulated simultaneously, in order to make theprime mover operating at the maximum power point and to guarantee at the same time a flux levelnear the rated value. Since this system is based on a unique reduced-power controlled converter and adiode rectifier, a noticeable reduction of the costs of the power electronics can be achieved. However,the diode bridge causes stator current and voltage harmonics which produce a noticeable torque ripple.A regulation scheme able to reduce the torque ripple is proposed in this paper: resonant currentcontrollers are implemented to track the sixth harmonic components in the reference rotor currentcommands, in such a way to kill the corresponding harmonic in the electromagnetic torque. |
| Download |
| Filename: | 0329-epe2014-full-19330281.pdf |
| Filesize: | 478.4 KB |
|
| Type |
Members Only |
| Date |
Last modified 2015-06-08 by System |
| |
 |