The ability of the Power SystemA critical societal System that, in the case of GW-scale gri... Click for more to resist changes in FrequencyThe number of cycles occurring in each second in an Alternat... Click for more. Inertia has traditionally been provided as a by-product of the operation of Synchronous GeneratorsA Generation Plant which is directly connected to the Power ... Click for more and other devices that are synchronised to the Frequency of the Power System.