Kaco blueplanet 87.0 TL3 S, Manual, Page: 80 / 110

Country-
spec. Set-
tings Men
u
level Display/
Setting Action in this menu/meaning
4 1 2 3 4
Active curve
1 - 5
F
Select the active curve.
NOTE: Up to 5 characteristic curves can be configured independently
and one of them can be activated for regulation each time.
10.4.3 P(f)
P(f) Active power response to overfrequence
Feed-in inverters must assist with frequency stability in the grid. If the grid frequency leaves the normal tolerance range
(e.g. ±200 mHz), the grid is in a critical state. In the event of overfrequency, there is a generation surplus, in the event of
underfrequency, there is a generation deficit.
PV-Systems must adapt their active feed-in power in relation to the frequency deviation. In case of overfrequency the
adaption of power is defined by a maximum feed-in limit. The actual power of the inverter may vary freely below this
limit based on possible fluctuation of the available power or set point, but will never increase above the absolute power
limit.
Fig. 80: Equation 1
Fig. 81: Equation 2
Equation 1 [See figure 80] [ } Page 80] defines the maximum limit with ΔP according to Equation 2 [See figure 81]
[
}
Page 80], P
M
the actual power at the moment of activation and P
ref
the reference power. In KACO PV inverters P
ref
is
defined as P
M
, the actual power at the moment of activation. f is the actual frequency and f
1
is the activation threshold as
configured.
Fig. 82: Equation 3
Fig. 83: Equation 4
In some standards the power adaption is not defined by a gradient – g but by a droop – s as in Equation 3 [See figure 82]
[
}
Page 80]. The droop s can be converted to a gradient g according to Equation 4 [See figure 83] [
}
Page 80].
During an overfrequency event the frequency f is above the activation threshold
f
1
Therefore the term (
f
1
–
f)
is nega-
tive and ΔP is a in-feed power reduction.
The measurement accuracy of the frequency is better than 10mHz.
The specific mode of operation of the function is specified by the grid operator or by applicable standards or grid codes.
The configurability of the function makes it possible to meet a wide variety of standards and grid codes. Certain configura-
tion options are not available in some country settings because the applicable standards or grid codes prohibit adjust-
ments.
P(f) Active power response to underfrequency
Some grid codes also require P(f) active power response to underfrequency. As PV plants typically operate at maximum
power point there is no available power reserve to increase power in case of underfrequency.
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
Page 80
EN-US