Title :
Sensorless control of a super synchronous slip ring induction machine for wind turbine operation
Author :
Chin, Philip S M ; Wong, Jonathan K J
Author_Institution :
Dept. of Electr. Eng., Singapore Polytech., Singapore
Abstract :
Modern drive designs aim to remove conventional sensors such as tachos and incremental shaft encoders on grounds of cost, reliability, and adverse environmental factors in which the machine may operate. This paper describes a novel technique for the sensorless control of a slip ring induction machine for sub or supersynchronous operations. Slip ring machines have a distinct advantage over conventional cage motors, where the rating of the power converter may be less than that for a cage drive when in supersynchronous operation. Full four quadrant sensorless control of a conventional Scherbius current source inverter is possible with the use of a novel adaptive filter using only analogue implementation. The four-quadrant operation allows the wind turbine to overcome the difficulties in starting at low wind speeds. The sensorless system reduces the complexity of the tacho system with an improved reliability.
Keywords :
asynchronous machines; machine control; power convertors; reliability; slip (asynchronous machines); wind turbines; adaptive filter; environmental factors; four quadrant sensorless control; power converter; reliability; subsynchronous operation; super synchronous slip ring induction machine; supersynchronous operation; wind turbine; Adaptive filters; Costs; Drives; Environmental factors; Induction machines; Inverters; Sensorless control; Shafts; Synchronous motors; Wind turbines;
Conference_Titel :
Power Electronic Drives and Energy Systems for Industrial Growth, 1998. Proceedings. 1998 International Conference on
Print_ISBN :
0-7803-4879-6
DOI :
10.1109/PEDES.1998.1330680