@article {72,
	title = {Dynamical sliding mode power control of wind driven induction generators},
	journal = {Energy Conversion, IEEE Transactions on},
	volume = {15},
	year = {2000},
	month = {Dec},
	pages = {451-457},
	abstract = {<p>This paper concerns power regulation of variable-speed wind energy conversion systems. These systems have two regions of operation, depending on the tip speed ratio of the wind turbines. They are distinguished by a minimum phase behavior in one of these regions and a nonminimum phase one in the other. A sliding mode control strategy is proposed that assures stability in both regions of operation and imposes the ideally designed feedback control solution in spite of model uncertainties. Moreover, power regulation by the proposed sliding control in the minimum phase region is completely robust to wind disturbances and parameter uncertainties</p>
},
	keywords = {asynchronous generators, Control systems, dynamical sliding mode power control, feedback, ideally designed feedback control solution, Induction generators, machine control, minimum phase behavior, minimum phase region, model uncertainties, nonminimum phase region, parameter uncertainties, Power control, Power generation, power regulation, Power system modeling, Robustness, Sliding mode control, stability, tip speed ratio, variable speed gear, variable structure systems, variable-speed wind energy conversion systems, wind disturbances, wind driven induction generators, Wind energy, Wind energy generation, Wind power generation, wind turbines},
	issn = {0885-8969},
	doi = {10.1109/60.900507},
	url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=900507},
	author = {De Battista, Hern{\'a}n and Mantz, Ricardo J. and Christiansen, Carlos F.}
}
@article {74,
	title = {Sliding mode control of wind energy systems with DOIG-power efficiency and torsional dynamics optimization},
	journal = {Power Systems, IEEE Transactions on},
	volume = {15},
	year = {2000},
	month = {May},
	pages = {728-734},
	abstract = {<p>Wind turbines with double output induction generators can operate at variable speed permitting conversion efficiency maximization over a wide range of wind velocities. However, random wind fluctuations, wind shear and tower shadow, may excite the oscillation mode of the mechanical system, producing large torque ripple. Consequently, damage to drive train components and power quality problems may occur. In this paper, a sliding mode control is developed which provides a suitable compromise between conversion efficiency and torque oscillation smoothing. The resultant sliding dynamics is completely robust to uncertainties in the electrical variables and parameters. In addition, to prevent windup problems due to saturation, a combined sliding surface that incorporates such limitations is proposed</p>
},
	keywords = {asynchronous generators, combined sliding surface, conversion efficiency maximization, double output induction generators, drive train components, electrical variables uncertainties, Fluctuations, Induction generators, large torque ripple, machine control, mechanical system, Mechanical systems, oscillation mode excitation, oscillations, Poles and towers, power efficiency, power generation control, Power quality, power quality problems, power supply quality, random wind fluctuations, resultant sliding dynamics, Sliding mode control, Torque, torque oscillation smoothing, torsion, torsional dynamics optimization, tower shadow, uncertainties robustness, variable speed, variable speed gear, variable structure systems, Wind energy, wind energy systems, wind shear, Wind speed, wind turbines},
	issn = {0885-8950},
	doi = {10.1109/59.867166},
	url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=867166},
	author = {De Battista, Hern{\'a}n and Puleston, Pablo F. and Mantz, Ricardo J. and Christiansen, Carlos F.}
}
