| Abstract |
This communication deals with the study and the control of an induction generator
intended to produce electrical energy in an autonomous wind station.
To provide it the necessary reactive power, the machine is connected to a PWM rectifier.
Furthermore, as the whole system is not linked to the network, for an autonomous running,
the voltage at the terminals of the rectifier must be kept constant whatever the speed of the
rotor and the load. To reach this purpose, we propose an electrical control of the whole system
In a first part, we achieve a modeling of the machine in a d-q frame taking into account the
saturation and the cross magnetizing effects.
The second part deals with the vector control of the whole system. This is achieved in a same
manner as a motor operating by keeping a constant flux in the machine and controlling the
DC voltage at the terminals of the rectifier.
A numerical program has been developed to analyze the behavior of the whole system
controlled thanks to the proposed scheme. Results for a voltage built up, as well as the
responses of the system to different disturbances of load and rotor speed are given and
discussed. |
