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Applied Computational Intelligence and Soft Computing
Volume 2012, Article ID 405314, 10 pages
Research Article

A Fuzzy Logic Controller to Increase Fault Ride-Through Capability of Variable Speed Wind Turbines

Department of Industrial Engineering, University of Salerno, Salerno, 84084 Fisciano, Italy

Received 4 October 2011; Revised 21 December 2011; Accepted 10 January 2012

Academic Editor: Anyong Qing

Copyright © 2012 Geev Mokryani et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A fuzzy controller for improving Fault Ride-Through (FRT) capability of Variable Speed Wind Turbines (WTs) equipped with Doubly Fed Induction Generator (DFIG) is presented. The controller is designed in order to compensate the voltage at the Point of Common Coupling (PCC) by regulating the reactive and active power generated by WTs. The performances of the controller are evaluated in some case studies considering a different number of wind farms in different locations. Simulations, carried out on a real 37-bus Italian weak distribution system, confirmed that the proposed controller can enhance the FRT capability in many cases.