How Do Generators Synchronize with One Another?

A generator cannot deliver power to an operating electric power system unless its voltage, frequency and other parameters are exactly matched. Synchronization is accomplished by controlling the exciter current and the engine speed of the generator/s.

Synchronization matches various parameters of one alternator to another alternator or to the bus bar. The process of synchronization is also known as paralleling of alternators or generators.

In modern multi-unit applications, physical bus connection and disconnection is achieved via high-speed motorized circuit breakers controlled by the interconnected generator controllers.