Optimal gain-scheduled control of fixed-speed active stall wind turbines

TitleOptimal gain-scheduled control of fixed-speed active stall wind turbines
Publication TypeJournal Article
Year of Publication2008
AuthorsBianchi FD, De Battista H, Mantz RJ
JournalRenewable Power Generation, IET
Date PublishedDecember
Keywordsfixed-speed active stall wind turbines, Hinf control, Hinfin control, linear parameter-varying system theory, linear systems, optimal gain-scheduled control, pitch servomechanism, power generation control, power production demands, wind farms, wind speed profiles, wind turbines

For a smooth integration of large wind farms into the utility grids, the individual wind turbines must be able to achieve various power control objectives. In this context, the authors focus their attention on the control of fixed-speed active stall wind turbines. This sort of turbine includes a pitch servomechanism to induce stall on the blades, thereby having control on the output power. The authors develop a methodology to design optimal gain-scheduled pitch controllers valid for the whole operating region of the wind turbine. The proposed solution uses concepts of linear parameter-varying system theory. In addition to providing a formal framework for the control design, this theory guarantees stability and performance. Further, because of the similarities with Hinf control, the tools developed for the controller design are very familiar to the control community. The main features of the proposed controller are assessed by means of numerical simulations obtained for realistic wind speed profiles and power production demands.

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