Methods for prediction of steady-state performance for unbalanced regulated 3-phase generators

Based on simultaneous solutions of algebraic equations, resultant values of excitation voltage are obtained for a regulated a-c generator operating under unbalanced conditions. These equations result from a detailed consideration of the reaction to unbalance of the regulator system components. In general, solutions of the equations can be obtained graphically; in some cases, they can be attained analytically. Both methods are applied to representative examples of regulated aircraft generators operating at 400 cycles. Once the excitation voltage is determined for a given unbalance, symmetrical components are applied to obtain voltages and currents. An accuracy of better than 10 per cent is estimated.