9440300990 12-3
DECS-250 Grid Code
Figure 12-2. Configure Screen
Active Power Control (APC)
BESTCOMSPlus Navigation Path: Settings Explorer, Grid Code Settings, Active Power Control
HMI Navigation Path: Settings, Operating Settings, Grid Code Settings, Active Power Control
The DECS-250 runs in Active Power Control mode continuously when grid frequency is normal (within the
dead band). It shifts into Limited Frequency Sensitive Mode (LFSM) when grid frequency is outside the
dead band. Then it shifts into Grid Recovery mode for a set period of time once grid frequency returns to
within the dead band.
APC Mode
When enabled, APC mode limits the generating unit's ramp rates for increasing and decreasing output.
The active power setpoint can be adjusted through analog inputs or remote communication protocols.
Alternatively, one of four active power levels can be selected through logic.
Active Power Control Settings
The active power setpoint, the maximum setpoint limit, and the minimum setpoint limit are established by
the Active Power Setpoint, Max Active Power Setpoint, and Min Active Power Setpoint settings,
respectively.
Power output ramp rates are established by the Normal Power Increase Rate and Normal Power
Decrease Rate settings. These rates are used when Active Power Control mode is active.
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