Study on speed sensorless control of Brushless Doubly-Fed wind power generator based on flux linkage of the power winding

2012 ◽  
Author(s):  
Yunguo Zhu ◽  
Xing Zhang ◽  
Chun Liu ◽  
Hongbing Chen
Keyword(s):  
Wind Power ◽  
Sensorless Control ◽  
Flux Linkage ◽  
Speed Sensorless ◽  
Power Generator ◽  
Wind Power Generator ◽  
Doubly Fed

A Planet Bearing Fault Case of Wind Turbine Gearbox

2014 ◽  
Vol 953-954 ◽  
pp. 472-477 ◽  
Author(s):  
Jia Xu ◽  
Jin Zhang ◽  
Tie Chen ◽  
Rui Hua Liu
Keyword(s):  
Wind Power ◽  
Typical Case ◽  
Wind Turbine Gearbox ◽  
Power Generator ◽  
Bearing Fault ◽  
Gear Fault ◽  
Wind Power Generator ◽  
Speed Up ◽  
Planet Gear ◽  
Doubly Fed

Doubly-fed wind power generator takes the largest share of wind energy. However, as the most important part, the speed-up gearbox is easy to be damaged. The existing researches about gearbox faults are mainly about gear fault, the study of bearing fault is relatively less compared with gear fault, expecially for the bearing fault of planet gear. This article presents a typical case of bearing fault about planet gear, which contains the cause of vibration behaviour and the analysis of fault.

Research on Direct Torque Control of Doubly-Fed Generator Based on DSP Technology

2013 ◽  
Vol 756-759 ◽  
pp. 430-434
Author(s):  
Zhi Cai Ma ◽  
Yue Zhang
Keyword(s):  
Wind Speed ◽  
Wind Power ◽  
Direct Torque Control ◽  
Low Frequency ◽  
Torque Control ◽  
Power Generator ◽  
Wind Power Generator ◽  
Space Vectors ◽  
Doubly Fed ◽  
Doubly Fed Generator

Doubly-fed VSCF wind power generator has become the main machine because it can improve the efficiency of wind power and obtain the optimal energy output at rated wind speed. In the control of excitation on double fed generator,the technique of direct torque control become the mostly method.This paper adopts voltage space vectors subdivision technology of direct torque control technology that can improve the low frequency characteristic,and structure the experiment system based on DSP. The result indicated the project is feasiblIntroduction Wind power as a kind of green energy has attracted more and more attention. in recent years, wind power technology has made rapid development. Double-fed generator becoming the main type of wind power generator because of its capture wind energy efficiency at rated wind speed. At present, foreign countries have successfully applied direct torque control ( DTC ) technique in VSCF doubly-fed wind power generator, Whereas DTC exist the problems of low frequency excitation current aberrance and output torque ripple. Therefore, this paper puts forward the space vectors subdivision method to improve the low-frequency characteristicbased on the traditional direct torque control of doubly-fed generator, And structure the doubly-fed generator direct torque control experimental platform about the digital signal processor ( DSP ), realize the grid-connected power generation.

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