Analysis of voltage build-up and speed disturbance ride through capability of a self-excited induction generator for renewable energy application

摘要

Response of a self-excited induction generator (SEIG) to transient change in input speed as well as no-load voltage build-up is crucial for its steady operation. These two aspects often find very limited mention in the reported work on SEIGs. In this paper, dynamic model of a standalone self-excited induction generator (SEIG) in short shunt compensation connection is developed. The developed model is utilised to investigate inception of self-excitation and voltage build-up with regard to different preconditions. The ride through capability of SEIG subjected to sudden drop in prime mover speed at no-load and the full-load of different power factors is evaluated. The results provide detailed and important insights of SEIG behaviour under such transient conditions. Finally, the load performance of SEIG is carried out with different step loads of unity and 0.8 lagging power factors to evaluate complete dynamics of the machine. The analytical model of SEIG is developed in MATLAB/Simulink. Experimental verification of results is done through an implemented three-phase, 1.5 K.W SEIG.