Sungrow SG1250UD User Manual

8. Inverter Functions Operation Manual
42
(T1)
(T2)
U2
U1
U /UPu
T
t (s)
Power state can
disconnect from the grid
On-grid operate
Fig. 8-1 Lower voltage withstand requirements
Note: U
T
indicates grid-connection point voltage, and Upu is the grid-connection point
nominal voltage.
Sungrow's inverter meets the abovementioned requirements.
8.5 High Voltage Ride Through
Technical Requirements for Connecting Photovoltaic Power Inverter to Power System
requires PV plant should be able to operate as required within certain voltage range.
Grid-connection pint voltage
Requirements
1.1U
pu
<U
T
<1.2U
pu
Operate for at least 10s
1.2U
pu
≤U
T
≤1.3U
pu
Operate for at least 0.5s
1.1
1.0
(s)
0.5(T1) 10(T2)0
0.5
1.2
1.3
1.4
14
U1
U2
-1
Grid fault and voltage increases
On-grid operation
Power station can disconnect
from the grid
U /UPu
T
t
Fig. 8-2 High voltage withstand requirements
Note: UT is the grid-connection point voltage, and Upu is the grid-connection point nominal
voltage.
Sungrow's inverter meets the abovementioned requirements.

Sungrow SG1250UD Specifications

General

Brand	Sungrow
Model	SG1250UD
Category	Inverter
Language	English