80
Step 3 Set DI control parameters. For specific parameter description, refer to the following table.
table 8-6 Parameter description
Parameter
Description
Control Method
Open-loop control: Active instruction controlled by DI is
sent to the power output port of the inverter, thereby
achieving active power control.
Closed-loop control:
• In case no Smart Energy Meter is selected, active in-
struction controlled by DI is used as target value, and
active power compensation ratio is calculated and sent
to the power output port of the inverter. Generally, this
strategy is used for fast and accurate active power
regulation.
• In case a Smart Energy Meter is selected, active in-
struction controlled by DI is used as target value, active
power of the meter needs to be collected and used as
input parameter, and active power compensation ratio
is calculated and sent to the power output port of the in-
verter. Generally, this strategy is used for anti-backflow
or avoiding zero power feed-in.
Select energy meter/
transformer*
Unselected
Select Smart Energy Meter involved in power regulation
Control Cycle
Time interval of delivering dispatching instructions
Parameter range: 5~60s
Instruction Type
kW: set active power value.
%: set active power percentage.
Feed-in Limitation Method*
To calculate the value to be sent for power control based
on the inverter's Nominal Power or Installed PV Power. If
the Installed PV Power is selected, fill in the total installed
power of PV modules based on the actual conditions in the
plant.
Note: *Only when the control method is set to Closed-loop control, the parameter Select
energy meter/transformer is settable.
Step 4 Add digital input manner.
Select the desired DI channel, fill in the Percentage (Fixed Value of Active Power), and
click Save.
- - End
Subsequent Operation
Delete digital input manner: select a digital input manner that needs to be deleted, and click
Clear data.
8 Grid Dispatching Function User Manual
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