@article {88,
	title = {Lyapunov-Designed Super-Twisting Sliding Mode Control for Wind Energy Conversion Optimization},
	journal = {Industrial Electronics, IEEE Transactions on},
	volume = {60},
	year = {2013},
	month = {Feb},
	pages = {538-545},
	abstract = {<p>This work explores an adaptive second-order sliding mode control strategy to maximize the energy production of a wind energy conversion system (WECS) simultaneously reducing the mechanical stress on the shaft. Such strategy successfully deals with the random nature of wind speed, the intrinsic nonlinear behavior of the WECS, and the presence of model uncertainties and external perturbations acting on the system. The synthesized adaptive controller is designed from a modified version of the super-twisting (ST) algorithm with variable gains. The suitability of the proposed strategy is proved by extensive computer-aided simulations employing a comprehensive model of the system emulating realistic conditions of operation, i.e., considering variations in the parameters and including external disturbances. Additionally, a second controller based on the traditional ST algorithm is also designed and simulated. Results are presented and discussed in order to establish a comparison framework.</p>
},
	keywords = {adaptive control, adaptive second-order control strategy, Algorithm design and analysis, CAD, Computational modeling, control system synthesis, Control systems, direct energy conversion, extensive computer-aided simulations, external disturbances, external perturbations, Generators, intrinsic nonlinear behavior, Lyapunov methods, Lyapunov-designed super-twisting sliding mode control, mechanical stress reduction, model uncertainties, Sliding mode control, ST algorithm, suitability strategy, super-twisting (ST), system emulating realistic conditions, Torque, variable gains, variable structure systems, WECS, wind energy conversion optimization, wind power, Wind power generation, Wind speed, wind turbines},
	issn = {0278-0046},
	doi = {10.1109/TIE.2012.2188256},
	url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6153362},
	author = {Evangelista, Carolina A. and Puleston, Pablo F. and Valenciaga, Fernando and Fridman, Leonid M.}
}
@article {99,
	title = {High-Order Sliding Control for a Wind Energy Conversion System Based on a Permanent Magnet Synchronous Generator},
	journal = {Energy Conversion, IEEE Transactions on},
	volume = {23},
	year = {2008},
	month = {Sept},
	pages = {860-867},
	abstract = {<p>This paper presents the output power control of a wind energy conversion system (WECS) based on a permanent magnet synchronous generator (PMSG). It is assumed that the considered wind module integrates a stand-alone hybrid generation system, jointly with a battery bank, a variable ac load, and other generation subsystems. The operation strategy of the hybrid system determines two possible operation modes for the WECS, depending on the power requirements of the load and the wind availability. The paper deals with the design of a combined high-order sliding mode (HOSM) controller for the power control of the WECS on both operational modes. The main features of the obtained controller are its chattering-free behavior, its finite-time reaching phase, its simplicity, and its robustness with respect to external disturbances and unmodeled dynamics. The performance of the closed-loop system is assessed through representative computer simulations.</p>
},
	keywords = {chattering-free behavior, closed loop systems, closed-loop system, external disturbances, finite-time reaching phase, High-order sliding mode (HOSM), high-order sliding mode controller, nonlinear systems, permanent magnet generators, permanent magnet synchronous generator, PMSG, Power control, power generation control, stand-alone hybrid generation system, synchronous generators, variable structure systems, WECS, Wind energy, wind energy conversion system, wind power plants},
	issn = {0885-8969},
	doi = {10.1109/TEC.2008.922013},
	author = {Valenciaga, Fernando and Puleston, Pablo F.}
}
