Control strategy of an active crowbar for DFIG based wind turbine under grid voltage dips

2007 ◽  
Author(s):  
Zhou Peng ◽  
He Yikang
Keyword(s):  
Wind Turbine ◽  
Control Strategy ◽  
Grid Voltage ◽  
Voltage Dips

Research on Flux Damping Control Strategy of DFIG during Grid Voltage Dips

2015 ◽  
Vol 713-715 ◽  
pp. 756-759
Author(s):  
Xu Guang Zhang ◽  
Zhen Xie
Keyword(s):  
Mathematical Model ◽  
Control Strategy ◽  
Grid Voltage ◽  
Damping Control ◽  
Simulink Simulation ◽  
Voltage Dips ◽  
Simulation Results ◽  
Stator Flux ◽  
Natural Component ◽  
Simplified Mathematical Model

A flux damping control strategy was proposed to accelerate the decay of stator flux and restrain stator, rotor current and torque oscillation caused by grid voltage dips. Firstly, this paper analyzes the simplified mathematical model of DFIG during symmetrical voltage dips. Then, the mechanism of flux damping control strategy to restrain stator, rotor current oscillation and increase flux damping was analyzed. The flux damping control strategy can increase the damping of stator side, which accelerates the decay of the stator flux natural component and improve the dynamic LVRT performance of DFIG. The correctness and effectiveness of this method is verified by MATLAB/Simulink simulation results.

scholarly journals Research on Wind Turbine Converter Control Based on Resonant Sliding Film Controller

2021 ◽  
Vol 236 ◽  
pp. 01020
Author(s):  
XU Wen-kuan ◽  
ZHANG You-peng
Keyword(s):  
Sliding Mode Control ◽  
Wind Turbine ◽  
Control Strategy ◽  
Sliding Mode ◽  
Control Object ◽  
Film Surface ◽  
Sliding Mode Controller ◽  
Grid Voltage ◽  
Mode Control ◽  
Unbalanced Grid

A resonant sliding mode control strategy based on the resonant sliding film surface is proposed to control the turbine-side converter of the wind turbine so that the wind turbine can be connected to the grid smoothly under the condition of unbalanced grid voltage. Taking the doubly-fed asynchronous wind generator working under unbalanced grid voltage as the control object, establish its mathematical model and its generator-side converter. Taking the instantaneous power in the α β static coordinate system as the state variable of the sliding mode controller, the resonant sliding mode controller is studied, its parameters are designed, and experiments are carried out in the simulation platform MATLAB. A 1.5MW motor model was established and tested, and it was verified that the resonant sliding mode control strategy can control the grid voltage without static error and realize the smooth grid connection of wind turbines.

Control Strategy of Full Power Converter for Wind Turbine under Grid Voltage Swell

2013 ◽  
Vol 448-453 ◽  
pp. 1815-1818 ◽  
Author(s):  
Zi Xu Lin ◽  
Hong Hua Xu ◽  
Wang Jian
Keyword(s):  
Wind Turbine ◽  
Control Strategy ◽  
Reactive Power ◽  
Power Converter ◽  
Grid Voltage ◽  
Dynamic Voltage ◽  
Voltage Swell ◽  
Voltage Swells ◽  
Full Power ◽  
The Impact

LVRT technology is currently a hot research of wind power, but the impact on the wind turbine of grid voltage swells and HVRT technology have not been given sufficient attention. This article analyzed the converter problems of full power wind turbine on grid voltage swells and used the control strategy of reactive power control, dynamic voltage and over-modulation to enhance the full power wind turbines HVRT capability.

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