Authors: Sajjad Shoja-Majidabad; Heydar Toosian-Shandiz; Amin Hajizadeh
Addresses: Electrical Engineering Department, University of Bonab, East Azerbaijan, Bonab, Iran ' Faculty of Electrical Engineering, Shahrood University of Technology, Semnan, Shahrood, Iran ' Faculty of Electrical Engineering, Shahrood University of Technology, Semnan, Shahrood, Iran
Abstract: This paper presents some novel fractional-order nonlinear sliding mode controllers for maximum power extraction of a grid-connected wind energy conversion system. Two similar fractional-order controllers with nonlinear sliding manifolds are proposed for generator-side and grid-side converters. The main role of the generator-side controller is regulating the mechanical speed of wind turbine to follow an optimum speed. On the other hand, the grid-side controller main goal is governing the active and reactive power by tuning DC-link voltage. Practical stability of both controllers is achieved by fractional-order nonlinear stability theorems. Comparative simulations are presented to show the effectiveness of the proposed controllers.
Keywords: wind energy conversion systems; WECS; fractional order SMC; nonlinear control; sliding mode control; permanent magnet synchronous generators; PMSG; robust control; wind power; wind turbines; simulation; controller design.
International Journal of Automation and Control, 2015 Vol.9 No.2, pp.107 - 129
Available online: 22 Jun 2015 *Full-text access for editors Access for subscribers Purchase this article Comment on this article