TRANSIENT BEHAVIOUR OF 3-PHASE SELF- EXCITED INDUCTION GENERATOR FOR REMOTE ZONE HEATING AND LIGHTING LOADS

Abstract

The increasing importance of fuel saving has been responsible for the revival of interest in so called alternative sources of energy. Thus the drive towards the decentralization of power generation and the increasing use of non-conventional energy sources such as wind energy, biogas and hydel potential, it has become essential to adopt a. low cost generating system which is capable of operating in remote areas and from a. variety of prime movers. With the renewed interest in wind turbines and micro-hydro-generators as an alternative energy source, the self-excited induction generators are being considered as an alternative choice to well developed synchronous generators. An induction generator working from smaller energy sources like wind or micro-hydel stations is very suitable to supply electrical energy required in isolated and remote areas. Keeping this in view a.n alternate is made to analyse the transient behaviour of a 3-phase self-excited induction generator supplying load over lines for the heating and lighting purposes. The performance of such a. system is greatly affected because of saturation in the machine. For this, the theory of saturated smooth-air-gap induction machines is applied to the analysis of the transient performance (large disturbance) of a self-excited induction generator. Both steady state and transient performance equations of this machine are given and the following cases have been considered