Setpoint specification of the active power controller

The setpoints of the active power controller are defined via the input process data in the Targets structure (see DataAreas), whereby the parameters of the ActivePower group are used for setting (see ActivePower).

The PGP controller processes setpoints according to the priorities defined in the standards:

• Network operator (Operator): The target fActivePowerLim acts as a limit.
• Direct marketer (Marketer): The target fActivePowerSet acts as a setpoint.

In the event of conflicting specifications, the smaller target value is used. This means that the direct marketer's specifications are only implemented within the limit defined by the grid operator.

Network-specific requirements

The prioritization of the active power specifications is set standard specific via the ControllerMode parameter (see Plant):

• DE_VDE4110_2023 for medium-voltage grid
• DE_VDE4120_2018 for high-voltage grid
• DE_VDE4130_2018 for extra-high voltage grid

By selecting the appropriate ControllerMode, the prioritization of the active power specifications for the respective grid is automatically applied as described below.

• Medium and high-voltage grid (VDE-AR-N 4110 / 4120):
• The active power output of the controller to the generating units is limited to the maximum value specified by the grid operator.
• High-voltage grid (VDE-AR-N 4130):
• In the event of an increase in power as a result of an underfrequency event, the automatic grid protection measure (e.g. frequency-dependent active power control P(f)) has has priority and may exceed the limit specified by the grid operator.

Rise limitation of the setpoints

The setpoints are adjusted with a slope limitation depending on the operating status, which is configured using the following parameters:

• ActiveTargetSlopeNormal for normal operation
• ActiveTargetSlopeCritical for critical state
• ActiveTargetSlopeRestart for restart phase
• ActiveTargetSlopeReconnect for reconnect phase

This differentiated slope limitation ensures a safe and stable adjustment of the setpoints, taking into account the grid situation and the system operating states.