Modeling and stability analysis of a DFIG-based wind-power generator interfaced with a series-compensated line

This paper deals with modeling and stability analysis of a doubly-fed induction generator (DFIG)-based wind-power unit that is interfaced with the grid via a series-compensated transmission line. A detailed mathematical model is developed in this paper that takes into account dynamics of the flux observer, phase-locked loop (PLL), controllers of the power-electronic converter, and wind turbine. Using the model and based on eigenvalue/participation-factor analysis, the system and controller parameters that substantially influence the system stability have been identified. The developed model is validated through a comprehensive set of simulation studies in the Matlab/Simulink and PSCAD/EMTDC software environments. Index Terms--Control, doubly-fed induction generator (DFIG), eigenvalue analysis, participation factor, power electronics, series compensation, small-signal analysis, wind power.