Steady State Analysis of an induction generator infinite bus system

This paper conducts a fundamental analysis on the induction generator infinite bus system which is a useful representation for a wind energy converter interfaced to a utility through a transmission line. A third order dynamic model is used to represent the induction generator and the resultant nonlinear system equations are analyzed to derive a condition that guarantees the existence of equilibrium points (or steady state solutions) to the dynamic system. This condition is used to derive three other auxiliary conditions which compute (i) the minimum value of capacitance, (ii) the maximum deliverable power and (iii) the maximum external reactance that can be connected to the machine. It is also shown that terminal voltage regulation has a strong restrictive influence on each the issues above. The analysis presented could be a useful tool for preliminary planning studies involving wind energy converters. Index terms : Induction generators, wind energy conversion