Fronius GEN24 - Page 47

Overfrequency
Parameter Range of val-
ues
Description Availability
"Calculation
Mode Overfre-
quency"
P
max
=
P
m
-P
m
(k*df)
Indicates the reference
power for calculating the
power limit in the event of
overfrequency.
Reference power
-
P
m
→ Momentary
power when the fre-
quency limit value is
exceeded.
-
P
n
→ Nominal power
of the device.
P
max
=
P
n
-P
n
(k*df)
P
max
=
P
m
-P
n
(k*df)
"Activation
Threshold Over-
frequency"
45 ‑ 66 [Hz] Frequency limit value
above which the power re-
duction takes place.
"Gradient Over-
frequency"
0.01 ‑ 300 [%/
Hz]
Gradient by which the ef-
fective power is reduced.
Example - conversion from
static to gradient:
Static s = 5 % → Gradient k
= 1/(0.05*50Hz) =
40 %/Hz
"Stop Fre-
quency - Over-
frequency"
45 ‑ 66 [Hz] Frequency value at which
the power reduction ends.
"Power at Stop
Frequency -
Overfrequency"
-100 ‑ 0 [%] Power when the set fre-
quency limit value "Stop
Frequency - Overfre-
quency" is reached. Ad-
justable between 0 % and
full charging power
(-100 %).
"Upper Deactiv-
ation Threshold
Overfrequency"
45 ‑ 66 [Hz] In use if "Mode" - "On (with
Hysteresis)" is set.
If the grid frequency falls
below this value, the fre-
quency-dependent power
reduction is terminated,
taking into account the
settings under "Fre-
quency-dependent Power
Control - General".
47
EN