Title: Robust fractional-order control of PMSG-based WECS

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.

DOI: 10.1504/IJAAC.2015.070003

International Journal of Automation and Control, 2015 Vol.9 No.2, pp.107 - 129

Received: 05 Feb 2015
Accepted: 16 Feb 2015
Published online: 22 Jun 2015 *

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