Operating Procedure For Grid Control - SMA SUNNY ISLAND 8.0H Installation Manual

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