Robust Fuzzy Control for Doubly Fed Wind Power Systems with Variable Speed Based on Variable Structure Control Technique

Table 1

The parameters of the wind turbine for simulation.

Parameter	Unit	Value
The blade radius ()	m	21.65
The rated power	kW	600
The whole of the rotor ()	kg·m^2
The friction coefficient ()	N·m·rad^−1·s	400
The increasing ratio of the gear case ()	/	43.165
The air density ()	kg/m^3	1.0308
The maximum rotor torque	kN·m	162