Sensorless variable-speed controller for existing fixed-speed wind power generator with unity-power-factor operation

2003 ◽  
Vol 50 (5) ◽  
pp. 1007-1015 ◽  
Author(s):  
G. Poddar ◽  
A. Joseph ◽  
A.K. Unnikrishnan
Keyword(s):  
Wind Power ◽  
Power Factor ◽  
Variable Speed ◽  
Unity Power Factor ◽  
Power Generator ◽  
Speed Controller ◽  
Wind Power Generator

Unity Power Factor Control of a Direct-Driven Permanent Magnet Synchronous Wind-Power Generator Based on Three-Level Converter

2011 ◽  
Vol 347-353 ◽  
pp. 2227-2230 ◽  
Author(s):  
Shu Xi Liu ◽  
Shan Li ◽  
Juan He
Keyword(s):  
Permanent Magnet ◽  
Power Factor ◽  
Synchronous Generator ◽  
Level System ◽  
Unity Power Factor ◽  
Power Generator ◽  
Energy Capture ◽  
Wind Power Generator ◽  
Level Converter ◽  
Power Factor Control

Direct-driven permanent magnet synchronous generator (PMSG) has become an important research subject besides the double-fed induction generator. With the increasing of unit capacity, the study of topology of high power converters based on multi-level converter is attracting more and more attention. The study of vector control of the direct-driven permanent magnet synchronous wind turbines based on three-level converter is carried out in this paper. Based on the maximum wind-energy capture control of the PMSG, the unity power factor operation of PMSG is realized by controlling the d-axis current to zero in the generator-side converter. A detailed comparative study of two-level system and three-level system is conducted. The simulation results verify the validity of this algorithm.

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