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Two Alternative Modeling Approaches for the Evaluation of Wind Farm Active and Reactive Power Performances

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3 Author(s)
Tapia, G. ; Dept. of Syst. Eng., Univ. of the Basque Country, San Sebastian ; Tapia, A. ; Ostolaza, J.X.

Based on the stator-flux-oriented electromechanical model of a doubly fed induction machine (DFIM), this paper presents two different approaches to wind farm modeling. Particularly, the overall control system of the DFIM is modeled in detail, so that tuning equations that allow adjusting the parameters of its proportional-integral (PI) compensators straightforwardly are provided. In addition to validating the wind generator model proposed, experimental tests carried out on a 660-kW doubly fed induction generator (DFIG) prove that such a control system makes it possible to govern separately its stator-side or net active and reactive powers. The two wind farm models proposed, which are assumed to be made up of DFIM type generators exclusively, are mainly devised to assist the design and test of closed-loop control algorithms for the wind farm total power factor. They generally imply significantly different computational loads, so that the second may be regarded as a simplified version of the first one. The net active and reactive power performances of both wind farm models are finally compared via simulation, which allows identifying the stronger and weaker points associated to each model

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Energy Conversion, IEEE Transactions on  (Volume:21 ,  Issue: 4 )