A regulated self-excited induction generator for use in a remote area power supply

The application of induction generators for remote area power supplies is discussed with particular reference to developing countries. The paper describes a method for calculating the minimum value of self-excitation capacitance necessary to initiate self-excitation with a stand-alone induction generator. Final steady-state self-excitation voltages and frequencies are also evaluated for both loaded and unloaded operation, taking into account the rotor parameter variations with frequency. It is shown that the calculated and measured results are in strong agreement, and for the loaded generator they agree considerably more so that when constant rotor parameters are used. Final steady-state self-excitation voltages and frequencies are shown to vary with the load demand, in some cases causing poor quality of supply. A new technique is proposed for voltage control to improve the regulation with load