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Appl. Sci. 2017, 7(11), 1140; doi:10.3390/app7111140

Control Strategies for Enhancing Frequency Stability by DFIGs in a Power System with High Percentage of Wind Power Penetration

Faculty of Electrical & Computer Engineering, University of Birjand, Birjand 97175, Iran
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Received: 8 October 2017 / Revised: 28 October 2017 / Accepted: 2 November 2017 / Published: 6 November 2017
(This article belongs to the Section Energy)
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Abstract

Nowadays, regarding high percentage of wind power penetration in power systems, operating conditions of power system necessitates wind turbine generators (WTGs) to contribute in frequency regulation of the system, similar to the conventional units. To reach this goal, active power output of WTGs must be controlled, but this issue distances the operating conditions of WTGs from maximum power point tracking (MPPT) mode. This paper initially presents a completed model of doubly fed induction generator (DFIG) for dynamic studies in frequency stability analysis. Next, a coordinated control strategy to regulate active power command set point (Pcmd) for individual WTGs in a wind farm (WF) and a control strategy to regulate wind power output of DFIG upon operator’s request is presented. Stability is assured under different wind conditions in the proposed control strategy. Individual WTGs set point allocation is performed applying fuzzy logic controller (FLC), while emotional learning based intelligent controller is used in regulation of the coefficient in the DFIG to reach the best stability conditions. Simulation results, performed on a test system consisting of both conventional units and WTGs, validate the effectiveness of the proposed control strategy in comparison with other mentioned solutions. View Full-Text
Keywords: emotional learning based intelligent controller; frequency stability; fuzzy logic controller (FLC); wind power; wind turbine generator (WTG) emotional learning based intelligent controller; frequency stability; fuzzy logic controller (FLC); wind power; wind turbine generator (WTG)
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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. (CC BY 4.0).

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MDPI and ACS Style

Kazemi Golkhandan, R.; Aghaebrahimi, M.R.; Farshad, M. Control Strategies for Enhancing Frequency Stability by DFIGs in a Power System with High Percentage of Wind Power Penetration. Appl. Sci. 2017, 7, 1140.

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