Study of dynamic behavior of grid connected induction generators

This paper explores the possibility of using a simple model for grid connected induction generators while studying the dynamic behavior of such systems. The approach used here is inspired from the method in use for the transient stability analysis of power systems. In this scheme both the stator and rotor transients of the machines are neglected. This enables the use of torque slip characteristics of the induction machines, in the analysis of their dynamic behavior. A concept of critical clearing slip has been introduced and its utility has been highlighted. The capabilities of the proposed model has been illustrated by studying the behavior of a sample system for the common types of events such as mechanical, electrical and switching disturbances.