Dynamic Undervoltage Detection - SMA SUNNY CENTRAL 500CP XT User Manual

10 Function Description

10.5.2.3 Dynamic Undervoltage Detection

The dynamic undervoltage detection extends the grid support in the event of undervoltage and changes the switch-off
behavior. The grid limits, which are stepped by default, are replaced by a continuous grid-limit function.
V /V [%]
Grid
100
1
2
Figure 43: Maximum duration of a voltage dip that the inverter can work through without disconnecting from the utility grid
Position Parameter
1 VCtllLim
2 VCtlllLim
3 −
A VCtllCharTm
B VCtllLimTm
The function of the dynamic undervoltage detection is activated via the parameter VCtllCharEna.
The function of the dynamic undervoltage detection is activated by default for Romania.
112 SCCPXT-E7-BA-en-58
A
Description
Grid voltage limit level 1
Grid voltage limit level 2
Time at which the inverter disconnects from the utility grid.
The delay time of the dynamic undervoltage detection defines the in-
tersection of the continuous grid-limit function with the time axis.
Delay time for grid limit level 1
Grid voltage
Dynamic grid support (FRT)
Grid disconnection
B
SMA Solar Technology AG
t
3
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