Advanced Grid Features": Gfdpr - Grid Frequency-Dependent Power Reduction P(F); Gfdpr - Function Description; Gfdpr - Application Example On Dishyst - Fronius SnapINverter Serviceanleitung

"Advanced Grid Features": GFDPR - Grid frequency-
dependent power reduction P(f)
GFDPR - Function
GFDPR = Grid Frequency Dependent Power Reduction
description
When the GFDPR function is enabled and the defined grid frequency limit value is exceed-
ed, the effective power is reduced according to a defined gradient.
Once the grid frequency falls within the permitted frequency range again following suc-
cessful power reduction, return to full power takes place depending on the country setup
as follows:
-
-
GFDPR - Applica- GFDPR ON/OFF = On DisHyst
tion example
On DisHyst
with Derating Gradient
(1)
(2)
(3)
(4)
with Stop Frequency
90
GFDPR ON DisHyst mode
The inverter increases the power from the current reduced value to the original value
in accordance with the same gradient used for power reduction.
GFDPR ON mode
The inverter will not increase the power to the original value until the frequency is in
the command value range for a specific length of time.
Enable Limit = 50.3 Hz
Derating Gradient = 84 %/Hz
Enable Limit UnderF.[Hz]
Derating Gradient U.F. [%/Hz]
P [%]
P
nom
P
m
P
red
0 49,6 49,7
P
nom
P
m
P
red
(4)
49,8 49,9 50,0 50,1
(3)
Nominal output
Actual power at the moment the
limit value is exceeded
Reduced power
(2)
50,2 50,3 51,3
(1)
f [Hz]