Gfdpr - Application Example With "Alt. Return Grad. 1" And "Alt. Ret. Grad Thr; Gfdpr - Application Example With "Return Gradient - Fronius SnapINverter Serviceanleitung

GFDPR - Applica- Example:
tion example with Alt. Ret. Grad Thr. = 25 %
"alt. Return Grad.
1" and "Alt. Ret.
Grad Thr."
P
P
At P
After the end of the delay time (2) specified by the standard, the power is increased by one
of the following gradients to the output value P
Curve 1 - black
The difference between the current power P
equal to the value entered for "Alt. Ret. Grad Thr." of 25 % (5).
This increases the power by the nominal output related gradient "Return Gradient 1" (3) to
the output value P
Curve 2 - grey
The difference between the current power P
the value entered for "Alt. Ret. Grad Thr." of 25 % (5).
This increases the power by the alternative difference power related gradient "alt. Return
Grad. 1" (4) to the output value P
GFDPR - Applica-
tion example with
"Return Gradient
2"
P
P
P
P [W]
(7)
nom
P
m
(1) (3)
(4)
red
(2)
the grid frequency returns to the permissible range.
red
.
m
P [W]
(5)
nom
m
(1)
(3)
red
(2)
P Nominal output
nom
P Actual power at the moment the
m
limit value is exceeded
P Reduced power
red
(1) Derating Gradient
(2) Frequency Test Time
(5)
(3) Return Gradient 1
(6)
(4) alt. Return Grad. 1
(5) Alt. Ret. Grad Thr.
P - P
m
(6) Alt. Ret. Grad Thr.
P - P
m
t [s]
(7) Initial Delay
:
m
and the reduced power P
m
and the reduced power P
m
.
m
P Nominal output
nom
P Actual power
m
P Reduced power
red
(4)
(1) Derating Gradient
(2) Frequency Test Time
(3) Return Gradient 1
(4) Return Gradient 2
(5) Initial Delay
Settings:
Use Return Grad. 2 = 1
Return Gradient 2 = n %/s
t [s]
n ... value
</= 25 %
red
> 25 %
red
is less than or
red
is greater than
red
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