SMA SUNNY ISLAND 8.0H - Operating Procedure for Grid Control

10 External Energy Sources in the Off-Grid System SMA Solar Technology AG
142 SI80H-60H-OffGrid-IA-en-11 Installation Manual
10.12 Operating Procedure for Grid Control
Event or state Result Internal transfer
relay
Grid management
activates the electricity grid.
‒Open, the
stand-alone grid is
not connected to
the electricity grid.
The line voltage is within the
configured limiting values
for voltage and frequency.
In order for grid management to detect a valid
voltage, the electricity grid must be within the
limiting values for voltage and frequency for a
minimum time.
If grid management detects a valid voltage, the
off-grid inverter synchronises the stand-alone grid
to the electricity grid.
The stand-alone grid is
synchronised.
The off-grid inverter connects the stand-alone
grid to the electricity grid.
Closed, the
stand-alone grid is
connected to the
electricity grid.
The stand-alone grid is
connected to the electricity
grid.
The electricity grid feeds current into the
stand-alone grid.
The grid management no
longer requests the
electricity grid.
The off-grid inverter disconnects the stand-alone
grid from the electricity grid and continues to
supply power to the stand-alone grid.
Open, the
stand-alone grid is
not connected to
the electricity grid.