Congure the characteristic curve under instructions from professionals to ensure
that the solar inverter works properly.
The Q-U characteristic curve control mode is to dynamically adjust the ratio Q/S
of output reactive power to apparent power in accordance with the ratio U/Un(%)
of the actual grid voltage to the rated grid voltage.
Parameter Description
Reactive power control
mode
Set this parameter to Q-U characteristic curve.
Reactive power
adjustment time
Species the change interval of the reactive power at
the grid-connection point.
Trigger power
percentage
Under a specic grid code, the characteristic curve
takes eect only when the actual output active power
of the device is greater than the specied value.
Exit power percentage Under a specic grid code, the characteristic curve
becomes invalid when the actual output active power
of the device is less than the specied value.
Limit value for
minimum PF
Limits the actual minimum PF when the Q-U
characteristic curve takes eect.
Characteristic curve
points
Species the number of points on the characteristic
curve.
The characteristic curve supports a maximum of 10
valid points.
U/Un(%) When conguring the curve, ensure that the U/Un(%)
value of a point is greater than the U/Un(%) value of
the previous point. Otherwise, the message indicating
invalid input will be displayed.
Q/S
cosφ-P/Pn Characteristic Curve
If you do not need the SmartLogger to send remote reactive power control
commands, you can congure the characteristic curve as a substitute. The
SmartLogger delivers the values
congured for the characteristic curve to the solar
inverter or Smart PCS, which then operates according to the conguration. The
SmartLogger no longer adjusts the values.
Congure the characteristic curve under instructions from professionals to ensure
that the solar inverter or Smart PCS works properly.
SmartLogger3000
User Manual 6 WebUI Operations
Issue 10 (2022-08-20) Copyright © Huawei Technologies Co., Ltd. 212
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