Linearization of Dynamic Model of Squirrel-Cage Induction Generator Wind Turbine

Nowadays the number of distributed generators (DG) is growing rapidly. This change will greatly influence the power system dynamics. Stability studies of large-scale power systems are becoming more and more difficult due to complexity and large variety of DG units. For example, small signal stability studies might be not so straightforward as before. A lot of questions appear: how to linearize generators with power electronics converters, in which range of operational variables will the linearized model perform well, what kind of linearization procedure to select, what are the limitations of linearized model, etc. In this paper some of these questions have been answered with an example of analytical linearization of squirrel-cage induction generator wind turbine.