Title :
A novel control strategy of an active crowbar for DFIG-based wind turbine during grid faults
Author :
Ren, Yuan ; Zhang, Wei
Author_Institution :
Coll. of Electr. Eng., Zhejiang Univ., Hangzhou, China
Abstract :
The crowbar resistance plays an important role in the protection of Doubly-fed induction generator (DFIG) wind power generation systems during grid voltage dips. This paper presents a novel control strategy primarily based on the real-time adjustable resistance crowbar structure. Design and control of the real-time adjustable resistance crowbar structure is described to limit the peak values of the rotor currents and DC-link voltage under a preset threshold. Further more, reactive power is provided both by grid side converter (GSC) and rotor side converter (RSC) in good time to assist the recovery of the grid voltage. The comparison of the response of single fixed crowbar resistance and real-time adjustable crowbar resistance is examined by simulation on a 1.5MW practical DFIG-based wind power generation system. The simulation results verify the correctness and effectiveness of the new control strategy.
Keywords :
asynchronous generators; power generation control; power generation faults; power grids; reactive power; rotors; wind turbines; DC-link voltage; DFIG; active crowbar; adjustable resistance crowbar structure; crowbar resistance; doubly-fed induction generator; grid faults; grid side converter; power 1.5 MW; reactive power; real-time adjustable resistance crowbar; rotor side converter; wind turbines; Reactive power; Real time systems; Resistance; Rotors; Stators; Torque; Wind power generation; Crowbar; Doubly-fed induction generator (DFIG); grid voltage dips; real-time adjustable resistance; wind turbines;
Conference_Titel :
Electric Machines & Drives Conference (IEMDC), 2011 IEEE International
Conference_Location :
Niagara Falls, ON
Print_ISBN :
978-1-4577-0060-6
DOI :
10.1109/IEMDC.2011.5994761
