Fronius GEN24 Operating Instructions Manual page 55

Example 6
Application example with "Return Gradient 1 Alternative" and "Return Gradient 1 Alternative
Threshold".
Description of the parameters
P Actual power at the moment the limit
m
value is exceeded
P Reduced power
red
(1) "Gradient Overfrequency"
(2) "Deactivation Time"
(3) "Return Gradient 1"
(4) "Return Gradient 1 Alternative"
(5) "Return Gradient 1 Alternative
Threshold": P - P
m
(6) "Return Gradient 1 Alternative
Threshold": P - P
m
(7) "Initial Delay"
The grid frequency returns to the permissible
range at P .
red
After the waiting time (2) has elapsed, the
power is increased to the initial value P
one of the following gradients:
Gradient 1 - red
The difference between the current power
P and the reduced power P
m
Gradient 1 Alternative Threshold" of 25 % (5).
Thus, the power is increased to the initial
value P with "Return Gradient 1" (3).
m
Gradient 2 - grey
The difference between the current power
P and the reduced power P
m
Gradient 1 Alternative Threshold" of 25 % (5).
This increases the power to the output value
P with "Return Gradient 1 Alternative" (4).
m
<= 25 %
red
> 25 %
red
with
m
is ≤ "Return
red
is > "Return
red
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