Dynamic stability and optimal excitation control of doubly excited synchronous machine: Influence of load characteristics

This paper is concerned with the effects of connected loads on the optimal excitation control and dynamic stability of power systems, incorporating doubly excited synchronous generators. The system studied is made up of a generating unit with local load and a transmission line connecting the machine to an infinite bus.A number of operating conditions are examined, and different system parameters used in order to identify effects attributable to the regulators, tie-line reactance, and the characteristics of the local load. For purposes of comparison, corresponding results of dynamic stability studies are also presented for the system with a conventional synchronous machine.