899258 krformance analysis of grid connected induction generators driven by hydro / wind turbines including grid abnormalities

This paper is the result of a study undertaken to assess the steady state and transient behavior of an Induction Generator (IG) driven by Mini Hydro or Wind turbines under grid abnormalities, as encountered in practice. Behavior under varying input power typically observed in wind machines is also reported. A computer simulation study was undertaken and results on a 220 KW Hydro machine and 55 KW Wind machine are presented indicating the effect of grid abnormalities and varying input power. Run-up, Re-switching and short circuit transients of the wind driven IG are analysed. Paper presents the dynamic modelling and computer simulation procedure. Relevant results are presented and discussed.