Review of static induction motor models

This paper presents a critical review of the static three phase induction motor models that have been proposed in the literature for power flow and long term voltage stability studies. The need for including static induction motor models in these two classes of studies is due to: a) Initializing dynamic induction motor models in time-domain stability studies; b) Assessing the effect of induction motor loads in long term voltage stability studies correctly. Both cases require improving the modeling detail of induction motors currently available in most commercial simulation programs, where loads can only be represented by static load models. After describing the different models that have been proposed, they are applied in an initialization case of a test power system in order to show the important differences that can be found between the simulation results obtained with the more detailed induction motor models and the ones of the model that is conventionally used. Finally, the most suitable models for representing the induction motor in different operating regions are selected.