Distributed Power Factor Closed-loop Control

To improve the revenue, a distributed PV plant needs to reduce or avoid the power factor surcharge by performing the distributed reactive power compensation. To enable the function, set the related parameters over the WebUI.

Before setting the parameters, ensure that the power meter is connected to the SmartLogger. For details, see Connecting the SmartLogger to a Power Meter.

Set Reactive power control mode to Distributed power factor closed-loop control.

Figure 8-10 Distributed power factor closed-loop control

• 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.