Kaco blueplanet 92.0 TL3 US Manual page 90

10 | Specifications
Country- Men Display/
spec. Set- u Setting
tings level
Number of nodes
2 - 5
Power
0.0 – 100.0 [% P
100.0 [% P
Voltage
80.0 – 126.0 [%
U ] /
nom
U ] /
nom
10.2.4 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. 89: Equation 1
Fig. 90: Equation 2
Equation 1 [See figure 89 [} Page 90] defines the maximum limit with ΔP according to Equation 2 [See figure 90
[} Page 90], P the actual power at the moment of activation and P
M
defined as P , the actual power at the moment of activation. f is the actual frequency and f
M
configured.
Fig. 91: Equation 3
Fig. 92: 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 91
[} Page 90]. The droop s can be converted to a gradient g according to Equation 4 [See figure 92 [} Page 90].
During an overfrequency event the frequency f is above the activation threshold f
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.
Page 90
Action in this menu/meaning
up to 5 support points definable The power value of the first and last
value pair is also used as the maximum or minimum active power value
that is valid across the limits of the characteristic curve.
] /
ref
] / 0.1
ref
112.0 [%
0.1
KACO blueplanet 92.0 TL3 US KACO blueplanet 110 TL3 US KACO blueplanet 125 TL3 US
Manual
the reference power. In KACO PV inverters P
ref
is the activation threshold as
1
Therefore the term ( f
1
is
ref
– f) is nega-
1