Grid Support In The Event Of Overvoltage (Hvrt) - SMA SUNNY CENTRAL 500CP XT User Manual

SMA Solar Technology AG

10.5.2.4 Grid Support in the Event of Overvoltage (HVRT)

In addition to providing grid support in the event of undervoltage, the inverter can support the utility grid in the event of
short-term overvoltage. The behavior of the inverter depends on the percentage ratio of grid voltage V
voltage V.
Figure 44: Maximum duration of overvoltage that the inverter can work through without disconnecting from the utility grid (example)
Ratio V /V
grid
Greater than 130%
115% to 130%
100% to 115%
The tripping threshold is defined by the parameter FRTDbVolNomMax.
User Manual
Inverter behavior
The ratio of grid voltage V
bance in the utility grid.
The inverter disconnects from the utility grid.
The ratio of grid voltage V
bance in the utility grid.
While this disturbance remains present, the inverter supports the utility grid with reactive cur-
rent. The inverter can bridge disturbances of up to 3 seconds without disconnecting from the
utility grid.
If the set grid monitoring time is exceeded during this period, the inverter disconnects from
the utility grid.
The ratio of grid voltage V
feeds in without any problems.
to nominal voltage V is in the critical range. There is a distur-
grid
to nominal voltage V is in the critical range. There is a distur-
grid
to nominal voltage V is in the normal range and the inverter
grid
10 Function Description
to nominal
grid
SCCPXT-E7-BA-en-58 113