Q-U Characteristic Curve - Huawei SmartLogger1000 User Manual

SmartLogger1000
User Manual

8.3.5 Q-U Characteristic Curve

If you do not need the SmartLogger to send remote reactive power control commands, you
can configure the characteristic curve on the SmartLogger as a substitute. The SmartLogger
delivers the values configured for the characteristic curve to the inverter, which then operates
in compliance with the configuration. The SmartLogger no longer adjusts the values.
Configure the characteristic curve under instructions from professionals to ensure that the
SUN2000 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.
Set Reactive power control mode to Q-U characteristic curve.
Figure 8-13 Q-U characteristic curve
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Issue 12 (2019-01-15)
 If the inverter is required to run with a specified power factor in certain periods of a day, add setting
records based on site requirements.
 When multiple time points are set, the inverter will run with the maximum power specified for the
time point that is earlier than and the closest to the system current time point. For example, if you
add 00:00:00 and 12:00:00 on the WebUI and the system current time point is 14:30:00, the inverter
will run with the maximum power specified for 12:00:00.
When configuring the curve, ensure that the U/Un(%) value of a point is greater than the
U/Un(%) value of the previous point. Otherwise, the Invalid input message will be
displayed.
The Q-U characteristic curve supports a maximum of 10 valid points.
Reactive power adjustment time allows you to control the change interval of the
reactive power for a grid-tied point.
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