This article compares the behaviour of different order models, for large scale wind farms comprising doubly fed induction generators (DFIGs). While it is important to have a model which is detailed enough that all interesting phenomena can be examined, it is also important to have simple models, not only to reduce computation time, but also to simplify the design of controllers. This article compares the characteristics of different order models for DFIGs and their responses to control. Eigenvalue analysis and numerical simulations are used to compare the characteristics of the different order models.