Country-
spec. Set-
tings
Men
u
level
Display/
Setting
Action in this menu/meaning
Dynamic reactive cur-
rent only
Off | On
Standard: The reactive current according to the formulae (2) and (4) is
fed as additional reactive current. The means that sum of the pre-fault
and additional reactive current is fed in.
Only dynamic: The reactive current according to the formulae (2) and (4)
is fed in as absolute reactive current. This means that regardless of the
reactive current before the voltage event, only the reactive current is
fed in according to the formulae (2) and (4) is fed in during the voltage
event.
Dead band mode
Mode 1 | Mode 2
Mode 1: When calculating the reactive current, the value of the dead
band is not subtracted from the amount of voltage change.
As such, formula (2) applies to overvoltage and undervoltage incidents.
Mode 2: When calculating the reactive current, the value of the dead
band is subtracted from the amount of voltage change. For overvoltage
and undervoltage events, formula (4) therefore applies:
I
b
1
I
Minimum operating
voltage
45 – 125.0 [%
Unom] &
Maximum operating
voltage
45 – 125.0 [%
Unom]
Dynamic grid support via fast feeding of residual current is activated on
voltage events with at least one phase/phase or phase/neutral con-
ductor voltage outside the configured normal operating voltage range.
Dynamic grid support via fast feeding ore residual current is deactivated
when the voltage returns to the normal operating voltage range.
Reactive current limita-
tion
0 – 100 % [ % Imax]
The reactive power component of the fast feeding of residual current is
limited to permit a defined proportion of active power components.
Minimum support time
1000 – 15000 ms
If due to a voltage jump in accordance with formula (1) and the con-
figured dead band is activated, the dynamic grid support is deactivated
via fast feeding of residual current after the minimum support time
elapses.
10.4
Other grid-supporting functions that are effective in the case of active power
10.4.1
Permanent power limitation
The maximum active and apparent power to be installed for a generation plant is agreed between the grid operator and
plant operator. The device capacity of a plant can be set to the exact agreed value using the S
lim
and P
lim
settings. To en-
sure that the load on the devices in the plant is uniform, we recommend distributing the performance reduction evenly
across all devices.
Some grid connection rules insist that the agreed reactive power be supplied from every operating point of the plant
without a reduction in the actual active power. Considering the fact that all KACO TL3 inverters have a semi-circular P-Q
operating range, a reduction in the active power is, however, required during operation at maximum active power be-
cause an apparent power reserve is not available. By adjusting P
lim
, the maximum active power can be restricted in order
to establish an apparent power reserve and ensure that the agreed reactive power can be delivered from any active
power operating point. Displays the appropriate P-Q operating range with a required example active power of 48% of the
maximum apparent power of the plant or 43% of the maximum active power of the plant.
KACO blueplanet gridsave 50.0TL3-S
Page 66
EN