Modeling of a Droop-Controlled Grid-Connected DFIG Wind Turbine

Traditionally, to characterize the response of droop-controlled systems RMS models have been used. However, as it is demonstrated in this work, when droop control is applied to doubly-fed induction generators, RMS models do not allow to predict the system stability and dynamic response. Thus, in this article, a linearized small-signal model that overcomes the limitations of RMS models is presented. The proposed model is validated by simulation in MATLAB/Simulink

Keywords: Doubly-fed induction generator (DFIG), droop control, small-signal modeling.