Inverter Functions; Operation Mode; Mode Change; Operation Mode Description - Sungrow SG2500-MV System Manual

10

Inverter Functions

10.1

Operation Mode

10.1.1 Mode Change

After being energized, the inverter will switch among different modes as shown in the figure
below.
Stop
Inverter is energized
All the grid-
connected
Initial requirements met
standby
Inverter restarts
Stop the inverter via LCD panel
Inverter restarts
Turn the Start/Stop switch to "Stop" or push
down the Emergency stop button
Upv is the DC input voltage of the inverter.
UpvStart is the inverter DC side startup voltage.

10.1.2 Operation Mode Description

Stop
This is the initial state of the inverter. The inverter DC and AC switches are in the "OFF"
position; the upstream and downstream connections are disconnected. The inverter is
therefore electricity-free.
Initial Standby
When the inverter upstream and downstream connections are connected and the AC & DC
switches are in the "ON" position, the inverter turns to the Initial Standby mode.
The inverter will continuously check if the PV array and the grid meet the grid-connection
requirements. If the inverter DC input voltage is higher than the inverter startup voltage and
the startup time is reached, whilst the requirements of the grid side parameter are satisfied,
inverter will turn from the Initial Standby mode into the Startup mode.
68
Unrecoverable fault
Stop and repair the inverter
Startup
Stop the inverter via LCD panel
Key-stop
Fig. 10-1 Operation modes change
Fault
Fault cleared and
Fault
setting time reached
occurred
Idc ≈ 0A for 10 minutes
Run
Upv>UpvStart and
setting time reached
Turn the Start/Stop switch to "Stop" or
push down the Emergency stop button
Emergency-
stop
Standby
Alarm
removed
Alarm Run