In some standards the power adaption is not defined by a gradient – g but by a droop – s as in Equation 3 [See
figure 87 [
Page 85]. The droop s can be converted to a gradient g according to Equation 4 [See figure 88
During an overfrequency event the frequency f is above the activation threshold
f
1
Therefore the term (
f
1
–
f)
is negative 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 configuration options are not available in some country settings because the applicable stan-
dards or grid codes prohibit adjustments.
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.
However, in case of curtailment of the Plant due to market control, active power increase up to the available
power is possible. As the inverter is not able to distinguish P constant set values between mandatory conges-
tion management of the grid operator and market control this needs to be implemented in the site specific
plant control infrastructure.
52
,
0
51
,
5
51
,
0
50
,
5
50
,
2
100
% P
M
60
% P
M
P
ref
=
P
M
P
f
P
1
ref
=
f
=P
f
50
P
,
P
M
M
P
2
Hz
f
1
s
=
=
=5
5
5
50,
%
s
s
f
s 5
stop
5
5%
%
=
%
%
%
%
%
deactivated
Frequency [Hz]
Active Power [%P
ref
M
=%P ]
Rate limited power increase after
deactivation of response
Fig. 89:
Example behaviour without hysteresis (mode 2)
10.2.4.1 Parameters for P(f)
Country-
spec. Set-
tings
Men
u
level
Display/
Setting
Action in this menu/meaning
P(f) Betriebsmodus
Off | Mode 1 |
Mode 2
Activate or deactivate function.
Mode 1:
With hysteresis activated. See figure 3.
Mode 2:
Without hysteresis activated. --- FEHLENDER LINK ---
4
1
2
3
4
Dynamic gradient
mode
On | Off
F
Activate dynamic gradient.
Maximum dynamic gra-
dient frequency
50,22 – 70,5 [Hz]
0.01 [Hz]
Minimum dynamic gra-
dient frequency
45 – 50 [Hz] 0.01
[Hz]
Dynamic gradient maximum frequency:
If dynamic gradient mode is activated, the gradient is calculated in order
to guarantee a linear power adjustment and reach the maximum charg-
ing power if the frequency rises to the maximum configured frequency.
Dynamic gradient minimum frequency:
If dynamic gradient mode is activated, the gradient is calculated in order
to guarantee a linear power adjustment and reach the maximum feed-in
power if the frequency drops to the minimum configured frequency.
10 | Specifications
Manual
KACO blueplanet 110 TL3 KACO blueplanet 125 TL3
Page 86
EN-US
