Fuzzy Technique to Determine Capacitance Requirement of Self Excited Induction Generator to Maintain Constant Air Gap Voltage With Variable Load

Abstract

Induction generators are increasingly used in non-conventional systems. In modern times, as the population increases, the demand for electricity also increases. As it is difficult for developing countries to generate that amount of electricity, so induction generators are used as standalone system to provide the electricity to remote areas. But the need for an external supply of reactive power (to produce a rotating magnetic flux wave) limits the application of an induction generator as a standalone generator. It is possible for an induction machine to operate as a Self-excited Induction Generator (SEIG) if capacitors are connected to the stator terminals in order to supply the necessary reactive power to achieve generating electrical energy in remote areas. But with the variation in speed or various parameters, the probability of reduced terminal voltage is more pronounced when power is supplied from an isolated SEIG. So it is significant to regulate exciting capacitance to maintain constant air gap voltage. Thus, computation of that value of capacitance, the fuzzy approach is used.