Transient performance of a three-phase self-excited induction generator supplying single phase load with Electronic Load Controller

Abstract

This paper presents the transient analysis of a three-phase self-excited induction generator (SEIG) feeding single-phase inductive load with an Electronic Load Controller (ELC) used in stand-alone micro-hydro power generation employing uncontrolled turbines. A complete mathematical model of the total system has been developed. The dynamic model of the SEIG using a three-phase star-connected induction machine is developed based on stationary reference frame d-q axes theory, with three capacitors connected in series and parallel with the single-phase load. The effect of cross-saturation is also incorporated in the model. The implemented ELC consists of a rectifier-chopper system feeding a resistive dump load whose power consumption is varied through the duty cycle of the chopper. Simulated results are compared with the experimental ones, obtained on a developed prototype of an SEIG-ELC system for the different transient conditions such as sudden application of load, sudden removal of load to validate the effectiveness of the proposed approach.