8CHEN Z. Characteristics of induction generators and power system stability[J]. Electrical Machines and Systems,2005,27(2):919-924.
9EKANAYAKE J B,HOLDWORTH L,WU X G. Dynamic modeling of doubly fed induction generator wind turbines[J]. Power Sys- tems, 2003,2 ( 18 ) : 803-809.
10LI Ruqi,WALLACE A,SPEE R. Two-axis model development of cage-rotor brushless doubly-fed machines [J]. IEEE Trans on Energy Conversion, 1991,6(3) :453-461.