Title :
Effect of Rotor Excitation Voltage on Steady-State Stability and Maximum Output Power of a Doubly Fed Induction Generator
Author :
Liu, Chien-Hung ; Hsu, Yuan-Yih
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
4/1/2011 12:00:00 AM
Abstract :
The effect of rotor excitation voltage on steady-state stability and output power of a doubly fed induction generator (DFIG) is investigated. Wind turbine mechanical torque-speed characteristics, as well as generator electromagnetic torque-speed characteristics, are considered in the derivation of the steady-state stability region for the magnitude and phase angle of the rotor excitation voltage. To evaluate the maximum output power of a DFIG, detailed expressions for stator power, rotor power, stator loss, rotor loss, and electrical power are derived as functions of the generator speed and the magnitude and phase angle of the rotor excitation voltage. The effect of stator resistance on the magnitude and phase angle of the resultant optimal rotor excitation voltage, which gives maximum output power and minimum loss, is examined. Experimental results are given to demonstrate the effectiveness of the theoretical analysis.
Keywords :
asynchronous generators; wind turbines; doubly fed induction generator; electrical power; generator electromagnetic torque-speed characteristics; magnitude angle; maximum output power; phase angle; rotor excitation voltage; rotor loss; rotor power; stator loss; stator power; steady-state stability; wind turbine mechanical torque-speed characteristics; Doubly fed induction generator (DFIG); maximum output power; renewable energy systems; rotor excitation voltage; steady-state stability; wind energy conversion; wind turbine generator;
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2010.2041137