SMA SC 400HE - Manual (Page 28)

3 Product Description SMA Solar Technology AG
28 SC4-63HE-BE-BEN103280 Operating Manual
3.10.4 Reactive Power Setpoint
The Sunny Central can provide reactive power. There are 10 methods available for specifying the
target value.
The reactive power can be supplied as follows:
• by entering fixed parameters on the Sunny Central Control
• by external signals from the distribution grid operator
• by adjustable characteristic curves in the Sunny Central Control
3.11 Active Island Detection
The active island detection function detects the formation of island grids during a grid failure and
disconnects the Sunny Central from the grid.
Island grids are created when the medium-voltage grid fails and the Sunny Central is feeding a
specific power output at the same time and there is a load and on the grid with a a load of the same
size. In such a stand-alone grid, the Sunny Central measures its own voltage, which is equal to the
grid voltage. As a result, the grid monitoring cannot detect any faults and the Sunny Central does not
disconnect from the grid.
To enable the active island function, contact the SMA Serviceline.
3.12 NET Piggy-Back
The NET Piggy-Back is an additional module for the Sunny Central Control. The NET Piggy-Back
allows you to directly e-mail the operating data of your PV plant from the Sunny Central Control to
any e-mail address.
Refer to the NET Piggy-Back documentation to connect the NET Piggy-Back.