Pf-U Characteristic Curve - Huawei SmartLogger1000 User Manual

SmartLogger1000
User Manual
Figure 8-18 Distributed power factor closed-loop control
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8.3.11 PF-U Characteristic Curve

If you do not need the SmartLogger to send remote reactive power control commands, you
can configure the characteristic curve as a substitute. The SmartLogger delivers the values
configured for the characteristic curve to the inverter, which then operates according to the
configuration. The SmartLogger no longer adjusts the values.
Set the parameters of characteristic curves under instructions from professionals to ensure that
the inverters work properly.
The control mode of the PF-U characteristic curve is to dynamically adjust the PF value in
accordance with the ratio U/Un(%) of the actual grid voltage to the rated grid voltage.
Set Reactive power control mode to PF-U characteristic curve.
Issue 12 (2019-01-15)
Electric meter power direction: Set this parameter to positive if the active power
reading of the power meter is positive when the inverter has no power output. Otherwise,
set this parameter to reverse.
Power Meter: When this parameter is set to Smart meter, the distributed power factor
closed-loop control takes effect.
Target power factor: Indicates the target value for the adjustment power factor of the
power meter, which should be larger than the appraisal value of the PV plant power
factor.
Adjustment period: Indicates the interval for sending adjustment commands by the
SmartLogger.
Adjustment deadband: Indicates the adjustment power factor precision, which takes
effect when the power factor on the gateway meter is larger than 0.9.
Reactive compensation delay: Indicates the delay time for starting the distributed
power compensation if the current power factor is lower than the target value.
When the SmartLogger receives a remote reactive power scheduling command by the PV plant,
Reactive power control mode automatically switches to Remote scheduling. To re-perform the
distributed reactive power compensation, set Reactive power control mode to Distributed power
factor closed-loop control and set Target power factor correctly.
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