Comparative analysis of induction generators for wind power system

Abstract

—This paper describes the performance comparison of a wind power systems based on two different
induction generators as well as the experimental demonstration of a wind turbine simulator for the maximum power
extraction. The two induction machines studied for the comparison are the squirrel-cage induction generator (SCIG)
and the doubly fed induction generator (DFIG). The techniques of direct grid integration, independent power control,
and the droop phenomenon of distribution line are studied and compared between the SCIG and DFIG systems. Both
systems are modeled in Matlab/Simulink environment, and the operation is tested for the wind turbine maximum
power extraction algorithm results. Based on the simulated wind turbine parameters, a commercial induction motor
drive was programmed to emulate the wind turbine and is coupled to the experimental generator systems. The turbine
experimental results matched well with the theoretical turbine operation.