Linked from
The 12 pages that link to Synchronous generator, each with the reason it gives.
Three-phase electric powerRelated: Utility generators commonly produce three-phase power directly.
Francis turbineRelated: A Francis turbine commonly drives one through a shared shaft.
Reactive powerRelated: Generator excitation controls its reactive-power exchange with the grid.
Power system stabilityRelated: Its rotor motion underlies classical rotor-angle stability.