Analysis of load transfer oscillations in parallel aircraft A-C electric power systems

THE PURPOSE of this paper is to investigate a method by which the performance of parallel aircraft a-c generator systems may be predicted, and to define boundaries for the characteristics of generator, regulator, constant-speed drive, and real and reactive load division circuit (LDC) which will guarantee satisfactory parallel operation. The method will be restricted to the analysis of load transfer oscillations in parallel generator systems. Its advantage is that only one generator system need be considered in order to investigate parallel operation and load transfer oscillations; this is because a parallel electric power system is symmetrical with respect to the voltage bus connecting the parallel generators.