Title :
Experimental Research on LVRT Capability of DFIG WECS during Grid Voltage Sags
Author :
Hu Shuju ; Xu Honghua
Author_Institution :
Key Lab. of Wind Energy Utilization, Chinese Acad. of Sci., Beijing, China
Abstract :
Low voltage ride through capability of DFIG wind energy conversion system had been paid much attention. The steady-state model of DFIG is discussed first, then the dynamic model is analyzed which considers transient current in stator side during voltage sags. To implement the LVRT capability of DFIG wind turbine, a method integrating rotor active crowbar and dcside damp circuit is adopted, and the specific LVRT control strategy is discussed. The experimental test is carried out on a lOkW experimental test setup, voltage sag generator is used to simulate grid voltage sag faults drop to 20% of rated voltage with different duration time, and therefore the validity of the LVRT control strategy is confirmed.
Keywords :
induction motors; power grids; reactive power control; rotors; stators; voltage control; wind power; wind turbines; LVRT; LVRT control; WECS; dc- side damp circuit; doubly-fed induction generator; grid voltage sags; low voltage ride through; power 10 kW; reactive power control strategy; rotor active crowbar; stator; transient current; voltage sag generator; wind energy conversion system; wind turbines; Circuit testing; Low voltage; Power quality; Rotors; Stators; Steady-state; Transient analysis; Voltage fluctuations; Wind energy; Wind turbines;
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2010 Asia-Pacific
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-4812-8
Electronic_ISBN :
978-1-4244-4813-5
DOI :
10.1109/APPEEC.2010.5448151
