Lyapunov-Designed Super-Twisting Sliding Mode Control for Wind Energy Conversion Optimization

TitleLyapunov-Designed Super-Twisting Sliding Mode Control for Wind Energy Conversion Optimization
Publication TypeJournal Article
Year of Publication2013
AuthorsEvangelista CA, Puleston PF, Valenciaga F, Fridman LM
JournalIndustrial Electronics, IEEE Transactions on
Date PublishedFeb
Keywordsadaptive 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

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.

Research Line: 
Control of renewable energy systems
Control of wind turbines and their integration to the grid
Control de turbinas eĆ³licas y su integraciĆ³n a la red