SMA CLUSTER CONTROLLER - Manual (Page 68)

13.3 Settings for Active Power Limitation
13.3.1 Controlling Active Power Limitation
Input signals up to 21 mA possible
For an analog signal source, the Cluster Controller classifies input signals as valid up to a
maximum of 21 mA. This enables intentional overload to ensure that the maximum setpoint is
reached.
Requirements:
☐ The configuration for the active power limitation must be agreed upon with the responsible
grid operator.
☐ The necessary parameter for the active power limitation must be set in the inverter (see
Section 13.2, page 67).
Procedure:
1. Log into the Cluster Controller as Installer.
2. In the system tree, select the Cluster Controller and select the menu Grid management
services in the device menu.
3. Make the general settings:
• Select the parameter group General settings > System control.
• Select [Edit].
• In the drop-down list Operating mode, select the entry Open-loop control.
• If you are using digital or analog inputs, enter the desired time interval in the field Time
interval for the output value.
• If necessary, adjust the value for the total system power. By default, the nominal inverter
power available in the system is used as the value for total system power.
– In the drop-down list Total system power select the entry User-defined.
– In the field Save user-defined total system power, enter the desired value.
4. Select the parameter group Active power and select [Edit].
5. Activate the checkboxes for the desired signal sources in the group Basic settings > Signal
source. Note that the desired Modbus server must be activated in the Cluster Controller when
you are using Modbus (see Section 12.1, page 64).
6. When using the digital inputs, make the settings for the digital inputs:
• Select the group Settings of digital inputs.
• In the field Failure tolerance time, enter a value above 1 second if possible. This
prevents e.g. a brief, simultaneous activation of two relays of a ripple control receiver
during a Cluster Controller status change being classified as an invalid status.
7. When using the analog inputs, make the settings for the analog inputs:
• Select the group Settings of analog inputs.
• In the field Failure tolerance time, enter the desired time interval.
• In the field Initial value input signal, enter the desired value.
13 Grid Management Services SMA Solar Technology AG / SMA America, LLC
User Manual ClusterController-BA-en-14 68