Answer / raul

Theoritically it is like dat only dat the frequency n voltage of the incoming machine must match the grid frequency n voltage for proper synch, but practically it is kept slightly higher in order to reduce the impact on speed governor n automatic voltage regulator bcoz as the grid pulls d generator into synchronism, there is sudden load applied on d generator due to which there is a dip in both frequency n voltage of d generator which is 2 b corrected by the speed governor by opening d turbine valve more n more steam enters into turbine which corrects d dip in frequency n on d other hand d AVR corrects d dip in voltage by giving d signal 2 d pilot exciter to give more excitation 2 d rotor field winding of d generator.
I hope d concept is now clear 2 u......

Answer / kj

In theory the frequency and voltage should match exactly.
In practice the incoming generator voltage and frequency
should be slightly hogher than the grid.

This is to prevent the set from tripping on reverse power
or kva. The incoming generator will pick up some load
straight away so the frequncy and voltage matches the grid.

Answer / raul

Please read some quality books first b4 answering such questions......... but still thnx for some brainstorming

Answer / b goutham

Actually the condition for synchronization is voltage and frequency of incoming generator should be equal to the grid otherwise there will dead short cicuit...and also large currents flows through the incoming alternator which may damage the winding of the alternator.....so the voltage and frequency should be the same...

is high voltage or high current is danger

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