SMA CLUSTER CONTROLLER - Manual (Page 33)

Example of the importance of lower and upper limits for setpoints
4 mA is set as the initial value for the active power limitation setpoint and 16 mA is set as the end
value for the active power limitation setpoint. If the grid operator sends a signal of 3.5 mA to the
Cluster Controller, the Cluster Controller then classifies this signal as 4 mA because the value of
4 mA is set as the lower limit for the active power limitation setpoint. If the grid operator sends a
signal of 17 mA to the Cluster Controller, the Cluster Controller then classifies this signal as 16 mA
because the value of 16 mA is set as the upper limit for the active power limitation setpoint.
Figure 8: Example of the importance of the lower and upper limits for setpoints related to the inverter parameter
Set active power limit or Pmax
Configurable parameters for active power control
Parameter Explanation
Activated Switches the active power control on or off
When the active power control is switched on, the active
power setpoint is being implemented gradually in accordance
with your additional settings in the group Settings for active
power control.
When the active power control is switched off, the active
power setpoint is implemented immediately.
Time interval in the event of a
changed setpoint Indicates the time interval at which the control command with
the new output value is to be sent to the inverters once the set-
point sent by the signal generator changes
The first output value is sent to the inverter immediately after the
setpoint is changed. If additional output values are required in
order to reach the setpoint, these will be sent at the specified
time interval. This enables, for example, an incremental in-
crease in the active power.
4 User Interface of the Cluster Controller SMA Solar Technology AG / SMA America, LLC
User Manual 33 ClusterController-BA-en-14