A new control strategy for MMC under grid voltage unbalance condition

2019 ◽  
Vol 29 (5) ◽  
pp. e2829
Author(s):  
Weisha Sun ◽  
Qiming Cheng ◽  
Yinman Cheng ◽  
Fengren Tan ◽  
Tao Li ◽  
...  
Keyword(s):  
Control Strategy ◽  
Grid Voltage ◽  
Voltage Unbalance

Control strategy of clustered micro-grids for grid voltage unbalance compensation without communications

2020 ◽  
Vol 14 (20) ◽  
pp. 4410-4415
Author(s):  
Baoquan Liu ◽  
Xuguang Zhao ◽  
Yan Liu ◽  
Yixin Zhu ◽  
Jingwen Chen
Keyword(s):  
Control Strategy ◽  
Grid Voltage ◽  
Voltage Unbalance ◽  
Micro Grids

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.

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