13.5
Grid Management Services
13.5.1 Dynamic Grid Support (FRT)
13.5.1.1 Full and Limited Dynamic Grid Support (FRT)
With dynamic grid support (Fault Ride Through ‒ FRT), the inverter supports the utility grid during a brief grid-voltage
dip (Low Voltage Ride Through ‒ LVRT) or during a short period of overvoltage (High Voltage Ride Through ‒ HVRT).
With full dynamic grid support, grid support is ensured by feeding in reactive current.
With limited dynamic grid support, the inverter interrupts grid feed-in during a grid instability without disconnecting
from the utility grid.
Q at Night and dynamic grid support
Limited dynamic grid support is available in the operating state "Q at Night".
The dynamic grid support function is activated via the parameter
FRTEna
. The inverter behavior can be controlled via
the parameter
FRTMod
. The level of reactive current provided with full dynamic grid support is determined via the
parameter
FRTArGraNom
. The grid limits and deactivation delays vary depending on the country.
13.5.1.2 Grid Support in Case of Untervoltage (LVRT)
The inverter can support the utility grid during a brief grid-voltage dip. The behavior of the inverter depends on the
percentage ratio of grid voltage V
grid
to nominal voltage V.
Figure 84: Maximum duration of a voltage dip that the inverter can work through without disconnecting from the utility grid
Ratio V
grid
/V
Inverter behavior
90% to 100%
The ratio of grid voltage V
grid
to nominal voltage V is in the normal range and the inverter
feeds in without any problems.
13 Function Description
SMA Solar Technology AG
System Manual
MVPS22JP-SH-en-11
208
Summary of Contents for 1000-1SC
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