Voltage and frequency control of parallel operated synchronous and induction generators in micro hydro scheme

The conventional control system for a standalone generator or more than one generator feeding the local load is not cost effective. This is because of the control system cost remains almost the same for the wide variations in the mini or micro hydro plant power rating. It is therefore envisaged that while using the combination of synchronous and induction generators can cut down the cost of electro-mechanical equipment. The synchronous generator may provide reactive requirements of the load. The frequency sensitive load controllers is proposed to provide a variable load in the system in order to make the load seen by two generators, due variation in the consumer load remains constant. This shall ensure the constant voltage and frequency operation of the system.