Title :
Adapting DFIGs for doubly-fed induction motors operation
Author :
Yongzheng Zhang ; Ooi, B.T.
Author_Institution :
Dept. of Electr. Eng., McGill Univ., Montreal, QC, Canada
Abstract :
This paper researches on: (i) adaptation of the popular 1.5 MW doubly-fed induction generators (DFIGs) used in wind farms for the motor market; (ii) the characteristics of the adapted DFIMs. The paper shows that the DFIM has 4-quadrant operation: positive speed motoring extending to 2 pu, regenerative braking, negative speed motoring and braking at negative speed. In order to exploit existing economic design based on rotor-side VSCs de-rated at maximum slip of 0.3, autotransformers are required for starting and operation in the extended speed range. Using decoupled P-Q control developed for DFIGs, the DFIMs have capability to operate at unity or leading power factor and as a precision speed and position controller.
Keywords :
asynchronous generators; autotransformers; induction motors; machine control; power generation control; regenerative braking; slip (asynchronous machines); wind power plants; 4-quadrant operation; DFIG; DFIM; autotransformers; decoupled P-Q control; doubly-fed induction generators; doubly-fed induction motor operation; economic design; motor market; negative speed motoring; position controller; positive speed motoring; power 1.5 MW; power factor; precision speed; regenerative braking; rotor-side VSC; wind farm; Induction motors; Reactive power; Rotors; Stators; Synchronization; Torque; Transient analysis; DFIG; DFIM; auto-transformer; back-to-back VSCs; decoupled-P-Q control; doubly-fed induction generator; doubly-fed induction motor; four quadrant; rotor side control; slip control; wound rotor induction motor;
Conference_Titel :
Power and Energy Society General Meeting, 2012 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4673-2727-5
Electronic_ISBN :
1944-9925
DOI :
10.1109/PESGM.2012.6345113
