Reset frequency
freset
Droop ∆P
Intentional
delay time
Deactivation
time tstop
Active power
gradient
The threshold frequency for deactivating the active
power response to overfrequency after the frequency
reducing.
Reducing the active power in percentage of P
n or PM
when the frequency rise to fstop.
The delay time for activating active power response to
overfrequency after the frequency over f1. An intentional
delay shall be programmable to adjust the dead time to a
value between the intrinsic dead time and 2s.
The delay time that the active power can increase after
the frequency below f
reset.
The active power increasing gradient as a percent of P
n
per minutes after the frequency reducing to freset.
➆
➇
➈
Here, the Droop is different from the Droop S in section 3.7.2 of the standard EN 50549-1.
If you want to configure the Droop S, the formula as below should be used to configure.
(fstop-f1)/fn
There are five modes (Please refer to the following table) can be chosen for this function and
many parameters can be configured according to the requirement of the local grid company.
Procedure:
Step 1：Tap “Active power settings” to enter to the next page.
Step 2：Tap “Overvoltage response settings” to enter to the next page.
Step 3：Tap the drop-down menu to choose the mode of this function.
Step 4：Configure the parameters and tap “Save”.
8.5.4 Active power reduction at overvoltage P(U)
➈
10
➈
11
Deactivation
threshold fstop
The threshold frequency for deactivating the active power
response to overfrequency or disconnecting the inverter
from the grid.
➅
Droop S
∆P =
×
100
UM0035_ASW05-12kH-T2-T3_EN_V01_0523
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