Advanced Islanding Detection - Kaco Blueplanet 87.0 TL3 Series Manual

10.4.2.1 Parameters for soft start-up
Country- Men Display/
spec. Set- u Setting
tings level
Power ramp
1 2 3 4 4
Gradient
1 – 600 [% / min]
Power rampup after
every connect
Power Rampup after
first connect
Power rampup after
grid error
10.4.3 Normal operation power gradient
In the case of very large plants, it may also be necessary to restrict the change in power level during normal operation. If
the set value (for increase and decrease in power level) and the solar irradiation change (for increase in power level), then
the grid feed-in power is increased or decreased in line with the configured gradient. A limitation is not possible if the so-
lar irradiation is reduced.
This function isn't active for changes in the power, which are defined by another grid support action such as the return of
power after Fault Ride Through, P(f), P(U).
10.4.3.1 Normal operation power gradient
Country- Men Display/
spec. Set- u Setting
tings level
Operating mode
On/Off
Increasing gradient
1-65534 [% S
Falling gradient
1 – 65534 [% S
10.5

Advanced islanding detection

Due to decentralized generation, there is the possibility that a deactivated part of the grid will remain live in an unin-
tended island due to the balance of load and generation in this part of the grid. The detection of unintended island forma-
tion is an important function of decentralized generating units and is related to the prevention of damage to equipment
as well as safety of personnel.
Depending on the structure and the operation of the distribution grid several dangers exist:
ž In case of maintenance work in a distribution grid, personnel may be placed in danger if the deactivated part of the
grid remains live as an island. This is especially the case if not all safety rules are followed.
ž If fast auto-reclosure is used in a distribution grid and the deactivated part of the grid remains live as an island, reclo-
sure will likely happen during phase displacement which might cause damage to rotating machinery on the grid.
ž In the event of a fault in a medium voltage grid, the faulty part of the grid is disconnected. If the fault has a significant
resistance, the deactivated part of a medium-voltage grid remains live as an island. Depending on the type of fault, but
explicitly in case of a fault in the transformer, dangerous medium voltage might be accessible or even present in low-
voltage appliances.
KACO blueplanet 87.0 TL3 KACO blueplanet 92.0 TL3 KACO blueplanet 110 TL3 KACO blueplanet 125 TL3
KACO blueplanet 137 TL3 KACO blueplanet 150 TL3
Action in this menu/meaning
NOTE: Power rampup is used to ramp up the powre gradually
Gradient of power limit. The maximum power limit increase to 100% of
nominaql power with the gradient specified.
Soft start ramp up is activated for every connection of the inverter to
the grid.
Soft start ramp up is activated for the first connection of the inverter to
the grid on a particular day after complete reboot of the inverter (AC
and DC disconnected).
Soft start ramp up is activated for connection of the inverter to the grid
after trip of the internal interface protection or via the external grid pro-
tection port (powador-protect).
Action in this menu/meaning
Activate or disable the power gradient limtitation in normal operation
The change in the active power is limited to a configured power increase
gradient
/ min]
max
The change in the active power is limited to a configured power de-
crease gradient.
/ min]
max
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