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9.12.13 Q(U) settings
Note: Voltage-dependent control Q(U)
regulates the reactive power output
depending on the voltage.
4 coordinates can be set in order to map the
The <Settings for> menu is opened.
1. Select the <Q(U) settings>.
2. Define U/Un, Q/Sn and phase for each
of the 4 coordinates.
3. Set the <Activation power> in % of Pn.
Note: Activation threshold as a percentage
of Pn corresponds to the “Lock-In” voltage.
3. Set the <Deactivation power> in % of Pn.
Note: Deactivation threshold as a
percentage of Pn corresponds to the
Fig. 127. Select Set Q(U) settings
Fig. 128. Set the Q(U) parameters
Definition:
The coordinates are the voltage as a
percentage of Un and the reactive power as a
percentage of Pn.
A grid operator can specify two active power
thresholds as a percentage of Un to activate
or deactivate the function. The active power
thresholds are normally referred to as the
“Lock-In” and the “Lock-Out” active power.
Fig. 129. Q(U) curve and non-hysteresis
Fig. 130. Q(U) curve and hysteresis