Adaptive low-voltage ride-through of DFIG based on crowbar with PDR and unloading protection circuit

2015 ◽  
pp. 21-24
Author(s):  
Huilan Jiang ◽  
Zhe Jiang ◽  
Xing An ◽  
Jingpeng Wang
Keyword(s):  
Low Voltage ◽  
Low Voltage Ride Through ◽  
Protection Circuit

scholarly journals Improving low-voltage ride-through capability of a multimegawatt DFIG based wind turbine under grid faults

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Mohamed Nadour ◽  
Ahmed Essadki ◽  
Tamou Nasser
Keyword(s):  
Reactive Power ◽  
Low Voltage ◽  
Power Networks ◽  
Low Voltage Ride Through ◽  
Protection Circuit ◽  
Recovery Simulation ◽  
Doubly Fed ◽  
Crowbar Protection ◽  
Voltage Recovery

AbstractLarge integration of doubly-fed induction generator (DFIG) based wind turbines (WTs) into power networks can have significant consequences for power system operation and the quality of the energy supplied due to their excessive sensitivity towards grid disturbances. Under voltage dips, the resulting overcurrent and overvoltage in the rotor circuit and the DC link of a DFIG, could lead to the activation of the protection system and WT disconnection. This potentially results in sudden loss of several tens/hundreds of MWs of energy, and consequently intensifying the severity of the fault. This paper aims to combine the use of a crowbar protection circuit and a robust backstepping control strategy that takes into consideration of the dynamics of the magnetic flux, to improve DFIG’s Low-Voltage Ride Through capability and fulfill the latest grid code requirements. While the power electronic interfaces are protected, the WTs also provide large reactive power during the fault to assist system voltage recovery. Simulation results using Matlab/Simulink demonstrate the effectiveness of the proposed strategy in terms of dynamic response and robustness against parametric variations.

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