Synchronization of the Stand-Alone Grid with External Energy Sources

Synchronization enables the Sunny Island to connect the stand-alone grid to the external energy source.

If external AC voltage is present at the Sunny Island, the Sunny Island synchronizes the stand-alone grid with the external AC voltage. When the stand-alone grid is synchronized with the external energy source, the Sunny Island closes its internal transfer relay. When the internal transfer relay is closed, the external energy source determines the voltage and frequency in the stand-alone grid.