SMA STP 60-10 - 4 Settings of Grid Management Services: Fault Ride-Through (FRT)

4 Settings of Grid Management Services: Fault Ride-Through (FRT)
SMA Solar Technology AG
Technical Information 9STP60-SHP75-10-Parameter-TI-en-12
4 Settings of Grid Management Services: Fault Ride-Through (FRT)
The inverter is equipped with the Fault Ride-Through function for both undervoltage (LVRT) and overvoltage (HVRT/
OVRT) situations. Although the FRT function belongs to grid management services, it is stored in the inverter. The FRT
function is set to cope with voltage dips down to 0% UNOM without time limit. This is confirmed in the FRT
performance test which was manually stopped after 60 seconds (see figure 1).
Figure 1: The FRT function of the inverter has been tested at 60 kW and three-phase voltage dips down to 80% UNOM, 50% UNOM, 20%
UNOM, 5% UNOM. The performance test was manually stopped after 60 seconds.
The parameter FRT_MODE is used to set the FRT operating mode for current feed-in. There are six selectable
operating modes.