Kaco blueplanet gridsave 50.0TL3-S Series, Manual, Page: 53 / 83

Q(U) 10 nodes
When it comes to Q(U) with 10 nodes, the reactive power target value is calculated continuously as a function of the grid
voltage. This function ensures that grid support is provided by the 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 you to limit functionality and to limit activation to cer-
tain voltage ranges as well as parametrise the transient response.
The positive phase sequence voltage is used to calculate the reactive power target value for three-phase devices.
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. 31: 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
23V – 287V
The control is activated above this voltage.
Lock-out voltage
23V – 287V
The control is deactivated below this voltage.
Number of nodes
2 – 10
Specify the number of nodes for the cos φ/(p/pn) characteristic curve
1st node … 10th node
Voltage | Reactive
power | Excitation
0 – 100 [% S
max
]
Power of the node as a percentage of the maximum power.
For the 1st node, the power must be 0%; for the last node, the power
must be 100%. The power values of the nodes must increase continu-
ously.
Note: Storage inverters only for feed-in operation
0 – 100% cos φ of the node
KACO blueplanet gridsave 50.0TL3-S
Page 53
EN