Title :
A new method to improve the LVRT of DFIG based on the current compensation
Author :
Chen Jinmei ; Xue Ancheng ; Tian Chunguang ; Bi Tianshu ; Gao Changzheng
Author_Institution :
State Key Lab. for Alternate Electr. Power Syst. with Renewable Energy Sources, North China Electr. Power Univ., Beijing, China
Abstract :
Doubly fed induction generator (DFIG) has been widely used as its converter capacity is small. However, the low voltage ride through (LVRT) of DFIG is still a problem. This paper proposed a new LVRT controller based on the philosophy of current compensation. First, base on the Laplace Transform, this paper analyzes the rotor and stator current transients under the grid fault, focused on the influence of the stator DC flux. And then, it proposes a combination control strategy consisting of current compensation control and DC crowbar control improve the LVRT of DFIG. The simulation with the RTDS verified the effectiveness of the proposed control strategy.
Keywords :
Laplace transforms; asynchronous generators; machine control; rotors; stators; DC flux; DFIG; IMprove; LVRT; Laplace transform; converter capacity; current compensation; doubly fed induction generator; low voltage ride; rotor current transients; stator current transients; Circuit faults; Equations; Mathematical model; Rotors; Stators; Voltage control; Voltage fluctuations; Crowbar; Current Compensation; Doubly Fed Induction Generator (DFIG); Low Voltage Ride Through (LVRT);
Conference_Titel :
Control Conference (CCC), 2011 30th Chinese
Conference_Location :
Yantai
Print_ISBN :
978-1-4577-0677-6
Electronic_ISBN :
1934-1768
