Fig. 67:
P-Q operating range with limited active power (Qmax=Smax≠Pmax) for Storage inverters
The power reduction parameters can be adjusted in SunSpec model DID123. During this process, you should
also check whether internal and/or external power reduction is active.
Internal power limitation
Parameters for external power limi-
tation
Parameters for power limitation
Status = active
Status = active
Parameters in SunSpec model 123:
Maximum apparent power
S
lim
=
92000 VA
“WMaxLimPct” = 50% P
lim
(
approx. 36800
W
)
“WMaxLimPct_RvrtTms” =
60s
“WMacLimPct_RmpTms” =
2s
“WMaxLim_Ena” =
1
Maximum active power P
lim
=
80% (approx. 73600 W)
AC fallback active power Pfb =
75%
P
lim
(approx. 55200 W)
PT1 settling time = 1s
Tab. 7:
Sample parameters for power limitation
If the ramp time
“WMaxLimPct_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 trans-
fer the new power value. Otherwise, the internally configured value will be used.
The additional ramp time “
WMaxLimPct_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. 68:
Power gradient according to sample parameters and calculation
The following formulae are used to calculate the Q filter parameter and cos ϕ gradient:
10 | Specifications
Manual
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