P(U) control reduces the active power that is fed in as a function of the grid voltage using a prescribed charac-
teristic curve as a basis. P(U) control is implemented as an absolute power limit. The actual power of the in-
verter may vary freely below this limit due to a possible fluctuation in the available power or the target value,
but at no time increases above the absolute power limit.
Page 79] are two examples of configuration. In figure 1
without hysteresis, the function is activated as soon as the voltage exceeds the configured voltage of data point
1 (dp1). The power limit follows the characteristic curve, a straight line between dp1 and dp2. The function is
deactivated as soon as the voltage falls below dp1. In [See figure 61 [
Page 79], the function is activated as
soon as the voltage exceeds the configured voltage of dp2. In this case, dp1 does not result in activation of the
function because the power limit remains at 100%. The power limit follows the characteristic curve, a straight
line between dp2 and dp3. However, because hysteresis is activated, the power limit is not increased when the
voltage drops. The function is deactivated as soon as the voltage falls below dp1.
Voltage
P
/
Pref
dp
1
dp
2
Fig. 60:
Example characteristic curve without hysteresis
P
/
Pref
dp
1
dp
3
dp
2
Voltage
Fig. 61:
Example characteristic curve with hysteresis and a
deactivation threshold below the activation threshold
10.2.3.1 Parameters for P(U)
Country-
spec. Set-
tings
Men
u
level
Display/
Setting
Action in this menu/meaning
4
1
2
3
4
Operation mode
Off | On
F
Activate the control process.
Off
: Deactivates dynamic grid support using dynamic reactive current.
Dynamic grid support remains active on account of immunity to inter-
ference.
Reference power
Actual power |
Nominal power
Specifies the power reference for the characteristic curve. 100 % here
corresponds to the nominal power or the actual power at the time the
function was activated, the time when the voltage passes the con-
figured node.
4
1
2
3
4
Evaluated voltage
Maximum phase
voltage | Positive se-
quence voltage
F
Select the voltage to be rated.
Defines which voltage in a three-phase system is to be evaluated.
Hysteresenmodus
Off | On
Off:
In Non-Hysteresis mode, the active power is increase immediately
in cases of falling voltage.
On:
In Hysteresis mode the power is not increased in case of falling
voltage.
Deactivation gradient
0 – 65,534 [% /
min] / 100 [% /
min] / 1
If the available power is above the actual output at the time of deactiva-
tion, the power increase back to the maximum power is limited. The
limitation is implemented by an absolute power limitation that in-
creases with a continuous gradient up to the maximum power. The ac-
tual power of the inverter may vary freely below this limit due to a pos-
sible fluctuation in the available power or the target value, but at no
time increases above the absolute power limit.
Manual
Specifications | 10
KACO blueplanet 100 TL3
Page 79
EN
