In conclusion, it should be emphasized that there is need for
users to study the effects of generator loss of excitation on system
operation and to evaluate the performance of the loss of excitation
protection for each generator. In the generalized study presented
here it was not possible to consider the effects of all combinations of
generator designs, voltage regulator characteristics, system parameters
or the interaction effects of the other generators. These effects
can only be completely determined by the study of a generator connected to a specific system