Study of Grid-Side Converter Control for Grid-Connected DFIG Wind Turbines under Unbalanced Load Condition

2006 ◽  
Author(s):  
E. Tremblay ◽  
A. Chandra ◽  
P. Lagace ◽  
R. Gagnon
Keyword(s):  
Wind Turbines ◽  
Load Condition ◽  
Unbalanced Load ◽  
Grid Side ◽  
Grid Side Converter

scholarly journals Reduced-Order-VSM-Based Frequency Controller for Wind Turbines

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 528
Author(s):  
Liang Lu ◽  
Oscar Saborío-Romano ◽  
Nicolaos A. Cutululis
Keyword(s):  
Power Systems ◽  
Wind Turbines ◽  
Rate Of Change ◽  
Reduced Order ◽  
Overcurrent Protection ◽  
Virtual Inertia ◽  
Grid Side ◽  
Grid Side Converter ◽  
Frequency Controller ◽  
System Frequency

Frequency support capability is becoming an important requirement for wind turbines, as wind power is increasingly integrated into power systems. In this paper, a frequency controller is implemented and validated. Such a controller allows wind turbines to help regulate the system frequency automatically and includes virtual inertia to help limit the rate of change of frequency. Compared with other methods, the controller achieves satisfactory frequency support capability with considerable simplicity. The controller is added to the grid-side converter controls, together with cascaded inner loops, which enables wind turbines to operate in grid-forming mode with overcurrent protection. The influence of the controller parameters on the frequency response is investigated.

scholarly journals Voltage Enhancement on DFIG Based Wind Farm Terminal During Grid Faults

2019 ◽  
Vol 9 (5) ◽  
pp. 4783-4788 ◽  
Author(s):  
P. D. Chung
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Wind Farm ◽  
Dynamic Voltage Restorer ◽  
Simulink Simulation ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
In Series ◽  
Grid Side ◽  
Grid Side Converter

This paper proposes a method of retaining high enough voltage on the terminal of DFIG wind turbines during a fault interval on the connected grid. This method is developed by the ideal of dynamic voltage restorer equipment and was applied to a wind turbines group. The DC-link and the grid side converter of the first DFIG wind turbine in this group are utilized to support the other wind turbines. The converter is connected to a transformer, which is in series with the wind turbine group and the connected line, during an external fault. At the DC-link of the back-to-back converter of each DFIG wind turbine, a DC chopper is equipped to dissipate excessive active power during the fault interval. Moreover, the controllers of all wind turbines are modified to support all wind turbines in the group. The method is verified by MATLAB/Simulink. Simulation results implied that the proposed method can retain a high enough voltage on the terminal of DFIG while preventing overcurrent on the rotor side.

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