Voltage control of parallel operated self excited induction generators

Two methods of analysis are proposed for use in the control of the common bus voltage of any number of parallel self-excited induction generators (SEIGs) under steady state balanced conditions. The methods are general and can be used for a single SEIG or a group of SEIGs employing similar or different machines with equal or unequal prime mover speeds. Theoretical predictions of the two models have been verified experimentally. Using these methods, effects of various parameters on the voltage control characteristics are examined for a number of cases employing similar and different SEIGs at equal and unequal speeds