Once the grid frequency falls within the permitted frequency range again follow-
ing successful power reduction, return to the full power available takes place de-
pending on the country setup as follows:
-
Mode: "On (without Hysteresis)"
The inverter increases the power from the current reduced value to the ori-
ginal value in accordance with the same gradient used for power reduction.
-
Mode: "On (with Hysteresis)"
The inverter will not increase the power to the original value until the fre-
quency is back in the target value range for a specific length of time.
Example 1 Description of the parameters
-
"P(f) Mode": On (without
Hysteresis)
-
"Configuration Method":
Gradient
-
"Active Grid Support": Off
-
"Calculation Mode Under-
frequency": P
max
= P
m
-
P
n
(k*df)
-
"Calculation Mode Over-
frequency": P
max
= P
m
-
P
n
(k*df)
(1) Momentary effective power when the
respective "Activation Threshold" is
reached: 60 % of P
n
(nominal power).
(2) "Gradient Underfrequency": 80 %/Hz -
Increase of output power without bat-
tery only possible if sufficient power
from PV generator is available and
manual power limitation is active. For
this purpose, the "Priority at Under-
frequency" parameter must be set to
"Priority on Frequency-dependent
Power Limitation".
(3) "Activation Threshold Underfre-
quency": 49.7 Hz
(4) "Gradient Overfrequency": 60%/Hz
(5) "Activation Threshold Overfrequency":
50.3 Hz
General power curve with overfrequency and underfrequency without hysteresis with gradients.
43
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