Dynamic Performance of a Stand-Alone Self-Excited Induction Generator for a Variable Speed Wind Turbine

Abstract

Induction generators are more appropriate machines for wind energy conversion. Induction generators generally can be operated in two modes i.e. grid or self-excited mode. Among the two, later is of improving importance due to its capability of wind energy conversion (primary) into electrical energy (secondary) for wide range of variations in the operating speed. Poor voltage regulation is observed in machine analysis. Steady-state and transient analysis of self-excited induction generator surveys that such generators are not efficient enough to maintain the frequency and terminal voltage in the absence of conventional controllers but are only used for stator and rotor currents variations. In this paper modeling of self-excited induction generator for wind energy conversion systems is designed and simulated in MATLAB environment. The system is studied for dynamic period simulation during the starting period, and load variation.