SUNNY ISLAND 5048 - Technical Description - Wind & Sun Ltd.
SUNNY ISLAND 5048 - Technical Description - Wind & Sun Ltd.
SUNNY ISLAND 5048 - Technical Description - Wind & Sun Ltd.
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Connecting External Sources SMA Solar Technology AG<br />
14.2.4 Grid Reconnection<br />
In stand-alone grid operation, the <strong>Sun</strong>ny Island constantly checks whether the grid has been<br />
reconnected (see above). The following conditions have to be fulfilled to guarantee that the<br />
<strong>Sun</strong>ny Island synchronizes with the supply grid and connects to the supply grid:<br />
• The frequency of the power distribution grid has to be between the values of the<br />
"232.05 GdFrqMin" and "232.06 GdFrqMax" parameter for the time defined in the<br />
"232.07 GdVldTm" parameter.<br />
• The voltage of the power distribution grid has to be between the values of the<br />
"232.01 GdVtgMin" and 5V below the "232.02 GdVtgMax" parameter for the time defined<br />
in the "232.07 GdVldTm" parameter.<br />
14.2.5 Grid Operation<br />
During grid operation, the power distribution grid and stand-alone grid are connected.<br />
The <strong>Sun</strong>ny Island is connected along with the stand-alone grid system to the power distribution grid.<br />
In this case, the voltage and frequency in both grids are identical.<br />
In grid operation, the grid monitoring checks whether the permissible limits for voltage and frequency<br />
(see Grid Reconnection) are maintained or whether the grid fails to assume powering the stand-alone<br />
grid system. For this, the power distribution grid is disconnected (grid replacement operation).<br />
The battery is generally charged or its charge is maintained on the grid.<br />
Charge Mode<br />
Charge mode on the grid is indicated by energy flowing to the battery. The battery is charged until<br />
the respective charge process (Boost, Full, Equalize) has been completed and the system changes to<br />
float charge (Float) (see section 13.4 ”Charge Control” (page 99)).<br />
Silent Mode<br />
Grid failures<br />
All grid failures affect the stand-alone grid during grid operation.<br />
In order to save energy, the silent mode can be activated using the "224.01 SilentEna" parameter set<br />
to "enable" (default: disable). In this case, the <strong>Sun</strong>ny Island is set to standby mode if the charge has<br />
been completed and the battery has been in float charge for some time (see section 13.4.5 ”Silent<br />
Mode” (page 103)).<br />
The silent mode is exited regularly to recharge the battery.<br />
In a single-phase parallel system, the grid failure is not detected on the individual <strong>Sun</strong>ny Island. This<br />
reaction occurs if the <strong>Sun</strong>ny Island is individually fuse-protected on the grid side and the individual<br />
fuses are separately tripped.<br />
124 SI<strong>5048</strong>-TB-TEN110340 <strong>Technical</strong> <strong>Description</strong>