Configuring Limitation of Active Power Feed-In


With the Data Manager, you can implement grid operator specifications for the limitation of the active power feed-in from 0% to 100% in your system. The setpoint for limitation of active power feed-in is specified in percent. The total system power is taken as the reference value. If your grid operator requires the system not to feed in any active power, you must limit the active power feed-in to a fixed value of 0% and additionally adjust the preset value for the active power gradient. Thus, it is possible to limit the active power feed-in to 0% within a few seconds. To compensate for load step changes and to establish a safety distance to the active power limitation, a negative value can be set. This achieves a timely limitation of the active power feed-in. The value for the limitation of the active power feed-in should be adjusted to the load step changes accordingly. No further inverter settings are necessary.

NOTICE

Responsibility of the system operator for grid management service specifications

The system operator is responsible for the correctness of the configurations and information on grid management services and system power. Incorrect settings and specifications can result in device and system damages.

  1. Set the grid management service specifications required by the grid operator and laid down in the standards correctly. Contact the grid operator if necessary.
  2. Enter correct values for system power. Adjust the values for system power during system expansions.
  3. Ensure that all required default values are applied or sent cyclically.

Supported inverters for the limitation of the active power feed-in to 0%

The limitation of the active power feed-in to 0% are only supported by inverters that support the fallback function. In the event of a communication failure between the product and the inverter, the inverter is reduced to an output power of 0% during fallback). For more information see the inverter manual at www.SMA-Solar.com.

Requirements:

  • The configuration for the active power limitation must be agreed upon with the responsible grid operator.

  • There must be an appropriate energy meter installed at the grid-connection point within the system.

Procedure:

  1. Log into the user interface of the Data Manager.
  2. Select the menu item Grid management service in the menu Configuration.
  3. Select the button Configuration and activation in the Active power row.
  4. The installation assistant will open.
  5. Confirm every step with [Continue]
  6. Select the operating mode Closed-loop control.
  7. Select the signal source Manual control.
  8. Enter the value 0 in the field Active power setpoint:
    • To set the limitation of the active power feed-in to 0% of the total system power, for example, enter the value 0 in the Active power setpoint field.

    • To set the limitation of the active power feed-in to -10% of the total system power, for example, enter the value -10 in the Active power setpoint field. Note that in this case power is always drawn from the utility grid.

  9. Activate the switch to adjust the modification speed of the setpoint.
  10. Enter the value 1 in the field Setting time
  11. Enter the value 100 in the field Active power gradient.
  12. Enter the total PV array power in the field Total system power.
  13. Click on [Save].