@article {77, title = {Linear parameter-varying control of permanent magnet synchronous generators for wind power systems}, journal = {IET Power Electronics}, volume = {7}, year = {2014}, month = {March}, pages = {692-704(12)}, abstract = {

This study presents an optimal control strategy for the electronic interface of a wind energy conversion system based on a permanent magnet synchronous generator (PMSG). A linear optimal control is used on the grid side of the interface to ensure a proper power transfer and a linear parameter-varying (LPV) control on the machine side to cope with the wide operating conditions demanded by the wind turbine applications. The dynamics of a PMSG working in a variable speed wind turbine is affected by the rotational speed of the wind rotor. The LPV control uses the generator speed as a scheduling variable to adapt itself to different operating conditions. The proposed scheme results in a multi-variable self-scheduled controller with a PI structure similar to classical approaches. Thus, the control ensures performance and stability in all possible operating conditions whereas the implementation and the numerical stability are similar to previous schemes. The proposed control has been implemented in a test bench that includes a fully-rated back-to-back converter. The experimental results show a good performance in different scenarios in which the controller has to adapt itself to highly varying operating conditions.

}, keywords = {electronic interface, fully-rated back-to-back converter, generator speed, interface grid side, linear optimal control, linear parameter-varying control, LPV control, multivariable self-scheduled controller, numerical stability, optimal control strategy, permanent magnet synchronous generators, PI structure, PMSG dynamics, power transfer, scheduling variable, variable speed wind turbine, wind energy conversion system, wind power systems, wind rotor rotational speed, wind turbine application}, issn = {1755-4535}, doi = {10.1049/iet-pel.2013.0149}, url = {http://digital-library.theiet.org/content/journals/10.1049/iet-pel.2013.0149}, author = {Trilla, Llu{\'\i}s and Bianchi, Fernando D. and Gomis-Bellmunt, Oriol} } @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 = {

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.

}, 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.} } @article {63, title = {Dynamical variable structure controller for power regulation of wind energy conversion systems}, journal = {Energy Conversion, IEEE Transactions on}, volume = {19}, year = {2004}, month = {Dec}, pages = {756-763}, abstract = {

The paper addresses the problem of output power regulation of fixed-pitch variable-speed wind energy conversion systems. Operation is constrained by practical reasons to the low-speed side of the turbine power-speed curve. Unfortunately, this region is characterized by a nonminimum phase dynamics which is an obstacle to perform the regulation task. A dynamical variable structure controller is developed that accomplishes the control objective despite this limitation. The proposed control strategy presents attractive features such as robustness to parametric uncertainties of the turbine and generator as well as to electric grid disturbances.

}, keywords = {65, Aerodynamics, Control systems, dynamical variable structure controller, electric grid disturbance, Electric variables control, Induction generators, Mesh generation, nonminimum phase dynamic, parametric uncertainty, Power control, Power generation, power generation control, power regulation, power supply quality, power system dynamic stability, power system interconnection, speed curve, turbine power, variable structure systems, Wind energy, wind energy conversion system, Wind energy generation, wind power, Wind speed, wind turbines}, issn = {0885-8969}, doi = {10.1109/TEC.2004.827705}, url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=1359955}, author = {De Battista, Hern{\'a}n and Mantz, Ricardo J.} }