Accurate modeling of the rotor side controller of a doublyfed induction generator (DFIG)based wind turbine is of vital importance since it has great effects on the dynamics of DFIGbased wind turbines. The complexity and interactions of its original model make its parameters difficult to estimate. Therefore

a new decoupling model is deduced. It is also proposed that the pseudo random binary signal be superimposed into the reference input

and the parameters are estimated by the transfer function relating an output signal to an input signal. The estimation results agree well with those of sensitivities. It is pointed out that the poor estimation results of parameters in the inner part of the controller are acceptable since they have little effect on DFIGbased wind turbine electromechanical dynamics. This work is supported by National Natural Science Foundation of China (No. 51190102

No. 51137002

No. 51207045)

National Basic Research Program of China (973 Program) (No. 2013CB228204) and National High Technology Research and Development Program of China (863 Program) (No. 2011AA05A103).