3 Product Description
SMA Solar Technology AG
30
SCCP-JP-BA-A4-en-12
User Manual
The dynamic grid support function is configured via the parameter
FRTEna
. The level of reactive current provided with
full dynamic grid support is determined via the parameter
FRTArGraNom
.
For the order option "Q at Night", limited dynamic grid support is available in the operating state "Q at Night".
3.8.6 Decoupling Protection Ramp
After a grid fault, the Sunny Central restarts at a maximum of 10% nominal power per minute using a decoupling
protection ramp. You have the option of switching this decoupling protection ramp on or off. If you deactivate the
decoupling protection ramp, the Sunny Central rapidly reverts to maximum power. If you wish to deactivate the
decoupling protection ramp, contact the SMA Service Line.
3.8.7 Grid Management Shutdown
If the utility grid becomes unstable, grid management requires that the Sunny Central disconnects from the utility grid
immediately to avoid grid overload. In this event a corresponding Modbus signal will be provided by the grid operator
or the safety system at the grid transfer point. The Sunny Central disconnects from the utility grid immediately and displays
the error
9013
. The error will be reset in the Sunny Central after a signal from the grid operator or the safety system for
the grid transfer point.
Ratio V
Grid
/V
Behavior of the Sunny Central
90% to 100%
The ratio of line voltage V
Grid
to nominal voltage V is in the normal range and the Sunny Central
feeds in without any problem.
20% to 90%
The ratio of line voltage V
Grid
to nominal voltage V is in the critical range. There is a disturbance
in the utility grid. While this error is present, the Sunny Central supports the utility grid with reactive
current. The Sunny Central can bridge errors of up to 5 s without disconnecting from the utility grid.
If the configured grid monitoring time is exceeded during this period, the Sunny Central
disconnects from the utility grid.
0% to 20%
The ratio of line voltage V
Grid
to nominal voltage V is in the critical range. There is a disturbance
in the utility grid. While this disturbance is present, the Sunny Central supports the utility grid with
reactive current. The Sunny Central can bridge disturbances of up to 1.2 s without disconnecting
from the utility grid. This is provided that the V
Grid
/V ratio was >= 90% before the fault occurred.
If the set grid monitoring time is exceeded during this period, the Sunny Central disconnects from
the utility grid.
Compliance with the Medium-Voltage Directive
The decoupling protection ramp is part of the Medium-Voltage Directive of the German Association of Energy and
Water Industries (BDEW) and must not be deactivated in Germany.
