Setting Limited Export - SMA INVERTER MANAGER Instrucciones De Instalación

5 LCS-Tool

5.2.7 Setting Limited Export

igure 23: LCS-Tool - setting Limited Export
With the Limited Export feature in connection with a
Modbus-capable energy meter, a maximum defned
AC output power can be made available at the
grid-connection point. The total nominal power of all
inverters connected to the Inverter Manager is taken
into account. At the grid-connection point, the
inverter's maximum output power is increased or
decreased by the amount of self-consumption.
The limitation at the grid-connection point is complied
with, while all connected loads can still be supplied
with energy from the inverters.
The maximum setpoint of the nominal PV system
power can be assigned with static or dynamic
attributes:
• Assignment of static attributes:
Set the parameter Active Power (P_ref) for
the active power limitation in the Inverter
Parameter menu under Support settings >
Immediate controls (see Section 5.2.11
"Setting Time of Use", page 38).
• Assignment of dynamic attributes:
In addition, the setpoint of the nominal system
power can be limited dynamically via the I/
O Box, Modbus and direct marketer interface.
If the value is set dynamically, the parameter
Active Power (P_ref) is overwritten in the
LCS-Tool. This applies to both the regular
feed-in operation and to the activated Limited
Export function. A load-dependent control is
not possible without an activated Limited Export
function. The inverters are then directly limited
to the setpoint.
34 IMVIOBOX-IA-xx-18
SMA Solar Technology AG
Procedure:
1. Open the LCS-Tool.
2. Log in as an Installer.
3. Call up the menu Setup.
4. Under Power Management > Limited
Export enable the option button Limited
Export Enabled and enter the respective
values.
5. Select [Save] to save the changes.
The parameters Meter IP-Address, Meter
Modbus Port, Meter Modbus Unit ID and the
register Meter Power Modbus are used for the
confguration of the energy meter.
With zero export as a special case of Limited Export,
the feed-in operation into the utility grid can be
completely prevented. The parameter Safety Offset
indicated as percentage of nominal PV system power
is a safety margin to the maximum value of the output
power set at the grid-connection point.
This safety value is preset for safety reasons and due
to sudden load changes. Thus, a safety margin to the
setpoint is ensured. With the activation process, the
setpoint is reduced to the safety value. Thus, the
feed-in power is always less than the actual setpoint.
The parameter Meter Connection Timeout is the
time in seconds that is required to adjust the nominal
PV system power to 0 W when communication to the
energy meter is interrupted.
To acquire an overview of the current system values,
open the Status menu and select Overview.
Installation Manual