Research on the Control Strategy for Grid-side Converter of PWM Doubly Fed Induction Wind Power Generators

2017 2nd Asia Conference on Power and Electrical Engineering

能源学;电工学

Liu, Yifang^1 ; Wang, Zhijie^2 ; Li, Renfu^1 ; Jiang, Xiuchen^3 ; Sheng, Gehao^3 ; Liu, Tianyu^2 ; Liu, Sanming^2

School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan

430074, China^1

College of Electrical Engineering, Shanghai Dianji University, Shanghai

201306, China^2

Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai

200240, China^3

关键词: Control strategies;    Doubly-fed inductions;    Electromagnetic torques;    Grid-side converter;    ITS applications;    Oscillation amplitude;    Power electronic devices;    Wind generator systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/199/1/012125/pdf
DOI  :  10.1088/1757-899X/199/1/012125

来源: IOP

【 摘 要 】

When the grid voltage drop, over current of transient rotor and over voltage may damage the power electronic devices. The attenuation of electromagnetic torque will lead to speed up. This paper proposes an improved feed-forward control strategy and its application in the PWM converter. When the PWM converter on voltage drops, bus voltage will be more stable. So over current problems of the DFIG rotor side can be reduced, and it also can improve voltage regulation speed of the DC bus voltage and reduce the oscillation amplitude. Furthermore, the stability of doubly fed wind generator system can be improved. The simulation results verify the validity of the modified control strategy.