Kaco blueplanet 87.0 TL3 S, Руководство пользователя

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Internal power limitation Parameters for external power limita-
tion Parameters for power limitation
Maximum apparent power S
lim
=
100000 VA
“WMaxLimPct” = 50% P
lim
( approx. 40000 W )
“WMaxLimPct_RvrtTms” = 60 s
“WMacLimPct_RmpTms” = 2 s
“WMaxLim_Ena” = 1
Maximum active power P
lim
= 80%
(approx. 80000 W)
AC fallback active power Pfb = 75% P
lim
(approx. 60000 W)
PT1 settling time = 1 s
Tab. 9: Sample parameters for power limitation
If the ramp time
“WMacLimPct_RvrtTms”
in the SunSpec model is specified as 0 s, then the internal output gradient
is used. Otherwise, the set value will be used.
Irrespective of the communication protocol used, the settling time
“WMaxLim_Ena”
is used in order to transfer the new
power value. Otherwise, the internally configured value will be used.
The additional ramp time “
WMacLimPct_RmpTms”
specifies the jump time from a power value to the new power
value.
The following formulae are used to calculate the gradient S
lim/min
:
Power / kVA resp. kW
Time / s
S
lim
=100
P
lim
=80
P
fb
=60
WMaxLimPct =40
10 20 30 40 50 60 70
Gradient = -600 % S
lim
/min
Fig. 87: Power gradient according to sample parameters and calculation
The following formulae are used to calculate the Q filter parameter and cos-phi gradient:
Fig. 88: Formula for calculating the Q filter parameter
Fig. 89: Formula for calculating the cos-phi gradient (internal power gradient)
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.
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
Page 84
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