A fast following synchronizer of generators

The theory and implementation of a synchronizer of generators, the fast-following synchronizer, are presented. The synchronizer is implemented by closed-loop control systems in which the motive power and the excitation current of a generator are controlled quickly and accurately so as to make the amplitude, frequency, and phase angle of the generator voltage follow those of the bus voltage of the power system in which the generator is going to be switched. The voltage across the generator breaker can be kept at zero continuously, and the generator can be switched in at any time without any surge current