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In this paper, performance analysis of a grid connected DFIG for non-optimum power tracking is carried out. In most of the analysis an optimum value of power tracking is assumed. In this paper a variant of load flow technique with DFIG is presented where the power coefficient can be specified different from the optimal value. Newton-Raphson (NR) technique has been employed to embed the DFIG circuit equations in the load flow formulation. The steady state values thus obtained are not only evaluated but also verified using a third order dynamic model of DFIG. The study shows that such a non-optimal operation influences the converter ratings and also the speed of response of the dynamic model.

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