Menu Settings Name Description
7051 450 kW Fixed power set point.
7121 2 DBL[%] Deadband low in percentages of nominal frequency.
7122 2 DBH[%] Deadband high in percentages of nominal frequency.
7123 1 HYSL[%] Hysteresis low in percentages of nominal frequency. If HYSL is set
above DBL, the hysteresis low is disabled.
7124 1 HYSH[%] Hysteresis high in percentages of nominal frequency. If HYSH is set
above DBH, the hysteresis high is disabled.
7131 150 MIN[kW] Minimum output of droop handling.
7132 900 MAX[kW] Maximum output of droop handling.
7133 50 SLPL[kW/%] Slope low. The setting determines the increase/decrease of power refer-
ence per percentage the actual frequency drops below nominal frequen-
cy.
7134 -50 SLPH[kW/%] Slope high. The setting determines the increase/decrease of power ref-
erence per percentage the actual frequency rises above nominal fre-
quency.
7143 ON Enable Enable droop curve function.
This droop function is performed based on the actual value for the power set point in the moment the droop is
activated. If for example, the function is activated during ramping and the actual power value at this moment
is 200 kW, the droop is performed based on 200 kW as the "Fixed Power Set point" stated in the diagram.
The slopes (7133/7134) are used, as long as the mains frequency has a direction away from nominal set-
tings. When the mains is starting to recover and the frequency is heading towards the nominal settings, the
power set point is waiting to be restored until the frequency is within the hysteresis limits. If the hysteresis is
disabled, the power set point will simply be restored using the slope.
When drooping, the slopes will be scaled based on size of the actual power at the droop start, compared to
the specified nominal power. For example, if a DG of nominal 1000 kW is producing 500 kW when droop is
activated, then only 50 % of the slope values will be used. To achieve a nominal droop of 40 % per Hz, a
1000 kW (50 Hz) DG should be configured with slopes of 200 kW/%. If the DG then only is producing 500 kW
when droop is activated, the actual slope will be experienced as 100 kW/%.
If "Auto ramp selection" is enabled (channel 2624), the secondary pair of ramps will be used during frequen-
cy-dependent power droop. In order to prevent a new situation with faulty mains, it may be advantageous to
use slower ramps in or after a situation with an unstable mains. The secondary ramps will automatically be
disabled again when the frequency-dependent power droop is no longer active, and the specified power set
point is reached. If "Auto ramp selection" is disabled, it is only possible to activate the secondary ramps using
M-Logic. Parameters used for the secondary ramps are stated in the table below.
GPC-3 DRH 4189340587 UK Additional functions
DEIF A/S Page 61 of 122
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