How do you synchronize 2 power generators?

Answer 1

generally the generators are synchrozised by checking three conditions

1. their terminal voltages must be the same

2.their frequencies must be same

3.their phase sequence must be same

if any one of the conditions are not satisfied and they are connected in parallel then the machines will be burnt with in a fraction of second

Answer 2

before synchronizing two generators be sure that the incoming generator little bit high frequency than other generator.after that processed before turning on in synchronization be sure that the indicator light of the synchronization meter 5 mins. before twelve and that is the time to synchronize the two generator....

Answer 3

Coupling 2 generator in parallel isn't as easy as you think:

their voltages must have the same value, the same frequency, and the same phase (ie, the voltage signal provided by one generator mustn't be shift phased compared to the signal of the other one).

Generally, you are parallelling a generator into a larger grid. What you do is set the new generator for slightly higher voltage than the grid and slightly higher frequency than the grid, and then monitor their phase angle with a synchrometer. As the new generator comes into and out of phase with the grid, you get ready to close the breaker and at the same time be ready to close the steam bypass valves on the condenser. At the correct point, usually 12:00 leading, you close the breaker and close the bypass valve. Closing the breaker locks the generator into the grid, while closing the bypass valve forces the generator to take some load. Then you adjust the frequency of the generator to trim to the desired MVars. Yes; the generator is locked, so adjusting the frequency is actually not possible, but this does affect MVars, and you want the correct MW/MVA/MVar load on the generator as quickly as possible, to avoid destabilization and possible damage.