Advanced Islanding Detection - Kaco blueplanet 87.0 TL3 M1 WM OD IIF0 Manual

10 | Specifications
to the fact that there is the risk that many plants could increase their power levels simultaneously after they
have been switched off by grid protection, a soft start-up is usually only required for start-up after a device has
been switched off by grid protection.
The soft start up is implemented by an absolute power limitation that increases with a continuous gradient up
to the maximum power. The actual power of the inverter may vary freely below this limit due to a possible fluc-
tuation in the available power or the target value, but at no time increases above the absolute power limit.
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 op-
eration. 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 solar 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
unintended island due to the balance of load and generation in this part of the grid. The detection of unin-
tended island formation is an important function of decentralized generating units and is related to the preven-
tion of damage to equipment as well as safety of personnel.
Depending on the structure and the operation of the distribution grid several dangers exist:
– 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.
Page 88
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
Manual
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