How generation voltage connect with grid

How to connect generation voltage with the grid  in BD. First power station generates voltage which rating is 11kv with 50 Hz frequencies but they started to pass voltage to the greed when it is synchronized. There are three conditions for synchronizing the voltage between the grid and the power station Bus Bar.

Conditions are:

  1. Voltage
  2. Frequency
  3. Phase Angle

Above this phase angle is always fixed in Bangladesh. So when the generation voltage and the frequency become the same of grid and station Bus Bar then connect the voltage to grid. Now a day’s automatic synchronizing process is used in Bangladesh.