Fig. 83:
cos φ /(P/Pn) standard characteristic curve with 3 nodes
Q(U) 10 Nodes
In Q(U) 10 nodes mode, the set value of the reactive power is calculated continuously as a function of the grid voltage.
This function ensures that grid support is provided by reactive power as soon as the voltage actually deviates from the
target voltage. In this case, a characteristic curve is specified which can be used to configure up to 10 nodes, value pairs
for voltage and reactive power. Other parameters allow to limit functionality and to limit activation to certain power lev-
els as well as parametrize the transient response.
The positive sequence voltage is used to calculate the reactive power target value for three-phase units.
230
207
0
Q [%PN]
U[V]
Q(U) standard characteristic
0
20
40
40
20
60
253
60
1) 43,6 | 207
2) 0 | 212
3) 0 | 230
4) 0 | 248
5) 43,6 | 253
Fig. 84:
Q(U) standard characteristic curve with 5 nodes
10.1.4
Parameters for reactive power control
Country-
spec. Set-
tings
Men
u
level
Display/
Setting
Action in this menu/meaning
cos-phi const.
1 – 0.3
Specified displacement factor
Over-excited | un-
der-excited
Reactive power mode Under-excited relates to inductive load, over-ex-
cited relates to capacitive load.
Q constant
0 – 100 [% S
max
]
Specification as a % of the maximum power
Under-excited |
over-excited
Reactive power mode Under-excited relates to inductive load, over-ex-
cited relates to capacitive load.
cos-phi(P/Plim)
Settling time
200 – 30000 [ms]
Determines the dynamic behaviour in the event of a change in the cos φ
set value. With a change of the active power or the lock-in and lock out
voltage, the cos φ is changed according to a PT-1 characteristic curve
with a settling time of 5 Tau.
Lock-in voltage
23 V – 287 V
The control is activated above this voltage.
KACO blueplanet 87.0 TL3 KACO blueplanet 92.0 TL3 KACO blueplanet 110 TL3 KACO blueplanet 125 TL3
KACO blueplanet 137 TL3 KACO blueplanet 150 TL3
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