The grid system in which generating stations and major consumer centre
s are integrated is employed by the National Electric Power Authority
in generating and distributing electricity in Nigeria. Gas turbines co
nstitute move than half of the generating sets. The Nigerian grid is p
rone to instability which causes disturbances in the system and gas tu
rbines are known to be sensitive to such disturbances. This paper is t
he result of a study of the effects of the instability of the grid on
the gas turbine sets.