SmartLogger3000 User Manual

M:SmartLogger3000

Setting Reactive Power Control

Large-scale plants are required to adjust the voltage at the grid-connection point. Power grid scheduling personnel enable a plant to absorb or add reactive power at the grid-connection point, that is, to enable the reactive power compensation, based on the real-time reactive power transmission status in the power grid.

Choose Monitoring > Inverter/PCS > Running Param. > Power Adjustment. On the page that is displayed, check that Remote power schedule is set to Enable.
Set the parameters for reactive power control and click Submit.
Figure 6-70 Reactive power control

No Output

Parameter	Description
Reactive power control mode	If the plant is not required to adjust the voltage at the grid-connection point or perform reactive power compensation, device can run with pure active output power. In this case, set this parameter to No output.

DI Reactive Scheduling

When setting this function, ensure that the user-defined DI port is not occupied. Otherwise, the setting will fail.
SmartLogger scenario: Before setting this function, ensure that the SmartLogger is properly connected to the ripple control receiver.
SmartLogger+SmartModule scenario: Before setting this function, ensure that the SmartModule is properly connected to the ripple control receiver.

Table 6-34 SmartLogger scenario

Parameter	Description
Reactive power control mode	Set this parameter to DI reactive scheduling.
DI NOTE: DI parameters include DI1, DI2, DI3, DI4, and Power factor.	Supports 16 levels of power factors. "√" indicates a low level. When the four DI ports of the SmartLogger are connected, the ports are low-level ports. When not connected, the ports are high-level ports. The percentage levels of DI1–DI4 must differ from each other. Otherwise, an exception will occur during command parsing. If the actual input DI signal is inconsistent with that configured on the WebUI, the SmartLogger controls the device to work at full power and the Reactive Power Scheduling Instruction Exception alarm is raised.

Parameter

Description

Reactive power control mode

Set this parameter to DI reactive scheduling.

NOTE:

DI parameters include DI1, DI2, DI3, DI4, and Power factor.

Supports 16 levels of power factors.
"√" indicates a low level. When the four DI ports of the SmartLogger are connected, the ports are low-level ports. When not connected, the ports are high-level ports.
The percentage levels of DI1–DI4 must differ from each other. Otherwise, an exception will occur during command parsing.
If the actual input DI signal is inconsistent with that configured on the WebUI, the SmartLogger controls the device to work at full power and the Reactive Power Scheduling Instruction Exception alarm is raised.

Table 6-35 SmartLogger+SmartModule scenario

Parameter	Description
Reactive power control mode	Set this parameter to DI reactive scheduling.
DI NOTE: The DI parameters include M1.DI1, M1.DI2, M1.DI3, M1.DI4, and Percentage.	Supports 16 levels of percentages. "√" indicates a low level. When the four DI ports of the SmartModule are connected, the ports are low-level ports. When not connected, the ports are high-level ports. The percentage levels of M1.DI1 to M1.DI4 must differ from each other. Otherwise, an exception will occur during command parsing. If the actual input DI signal is inconsistent with that configured on the WebUI, the SmartLogger controls the device to work at full power and the Reactive Power Scheduling Instruction Exception alarm is raised.

Parameter

Description

Reactive power control mode

Set this parameter to DI reactive scheduling.

NOTE:

The DI parameters include M1.DI1, M1.DI2, M1.DI3, M1.DI4, and Percentage.

Supports 16 levels of percentages.
"√" indicates a low level. When the four DI ports of the SmartModule are connected, the ports are low-level ports. When not connected, the ports are high-level ports.
The percentage levels of M1.DI1 to M1.DI4 must differ from each other. Otherwise, an exception will occur during command parsing.
If the actual input DI signal is inconsistent with that configured on the WebUI, the SmartLogger controls the device to work at full power and the Reactive Power Scheduling Instruction Exception alarm is raised.

Before connecting the SmartModule to the SmartLogger, if DI reactive scheduling has been configured for the DI port and the scheduling signal needs to be connected to the SmartModule, delete the DI configuration and reconfigure it.
In the scenario where the SmartLogger and SmartModule are combined, if the SmartModule is removed and the scheduling signal needs to be connected to the SmartLogger, delete the DI configuration and reconfigure it.

Reactive Power Fix Control

Parameter	Description
Reactive power control mode	If the array is required to generate constant reactive power at a specified time, set this parameter to Reactive power fix control.
Start time	If the device is required to run with specified maximum power in certain periods of a day, add records based on site requirements. When multiple time points are set, the device will run with the maximum power specified for the time point that is earlier than and the closest to the current system time. For example, if you add 00:00:00 and 12:00:00 on the WebUI and the current system time is 14:30:00, the device will run with the maximum power specified for 12:00:00. NOTICE: The device will not follow the setting after 00:00:00. To allow the device to follow the setting across days, you need to specify the setting for 00:00:00.
Reactive power(kVar)

Parameter

Description

Reactive power control mode

If the array is required to generate constant reactive power at a specified time, set this parameter to Reactive power fix control.

Start time

If the device is required to run with specified maximum power in certain periods of a day, add records based on site requirements.

When multiple time points are set, the device will run with the maximum power specified for the time point that is earlier than and the closest to the current system time. For example, if you add 00:00:00 and 12:00:00 on the WebUI and the current system time is 14:30:00, the device will run with the maximum power specified for 12:00:00.

NOTICE:

The device will not follow the setting after 00:00:00. To allow the device to follow the setting across days, you need to specify the setting for 00:00:00.

Reactive power(kVar)

Power Factor Fix Control

Parameter	Description
Reactive power control mode	If the plant is required to generate a constant power factor at the grid-connection point and the device is required to adjust the real-time reactive power based on the preset power factor, set this parameter to Power factor fix control.
Start time	If the device is required to run with specified power in certain periods of a day, add records based on site requirements. When multiple time points are set, the device will run with the power specified for the time point that is earlier than and the closest to the current system time. For example, if you add 00:00:00 and 12:00:00 on the WebUI and the current system time is 14:30:00, the device will run with the maximum power specified for 12:00:00. NOTICE: The device will not follow the setting after 00:00:00. To allow the device to follow the setting across days, you need to specify the setting for 00:00:00.
Power factor

Parameter

Description

Reactive power control mode

If the plant is required to generate a constant power factor at the grid-connection point and the device is required to adjust the real-time reactive power based on the preset power factor, set this parameter to Power factor fix control.

Start time

If the device is required to run with specified power in certain periods of a day, add records based on site requirements.

When multiple time points are set, the device will run with the power specified for the time point that is earlier than and the closest to the current system time. For example, if you add 00:00:00 and 12:00:00 on the WebUI and the current system time is 14:30:00, the device will run with the maximum power specified for 12:00:00.

NOTICE:

The device will not follow the setting after 00:00:00. To allow the device to follow the setting across days, you need to specify the setting for 00:00:00.

Power factor

Q-U Characteristic Curve

If the remote reactive power control command is not available, you can configure the characteristic curve as a substitute. The SmartLogger delivers the values configured for the characteristic curve to the inverter or Smart PCS, which then operates according to the configuration. The SmartLogger no longer adjusts the values.

Configure the characteristic curve under instructions from professionals to ensure that the inverter or Smart PCS works properly.

In the Q-U characteristic curve control mode, the inverter or Smart PCS dynamically adjusts 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	Specifies the change interval of the reactive power at the grid-connection point.
Trigger power percentage	Under a specific grid code, the characteristic curve takes effect only when the actual output active power of the device is greater than the specified value.
Exit power percentage	Under a specific grid code, the characteristic curve becomes invalid when the actual output active power of the device is less than the specified value.
Limit value for minimum PF	Limits the actual minimum PF when the Q-U characteristic curve takes effect.
Characteristic curve points	Specifies the number of points on the characteristic curve. The characteristic curve supports a maximum of 10 valid points.
U/Un (%)	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 message indicating invalid input will be displayed.
Q/S

cosφ-P/Pn Characteristic Curve (Inverter/PCS)

Configure the characteristic curve under instructions from professionals to ensure that the inverter or Smart PCS works properly.

In the cosφ-P/Pn characteristic curve control mode, the inverter or Smart PCS dynamically adjusts the power factor cosφ in accordance with the P/Pn (%) based on the VDE-4105 and BDEW German standards.

Parameter	Description
Reactive power control mode	Set this parameter to cosφ-P/Pn characteristic curve (inverter) or cosφ-P/Pn characteristic curve (PCS).
Reactive power adjustment time	Specifies the change interval of the reactive power at the grid-connection point.
Characteristic curve points	Specifies the number of points on the characteristic curve. The characteristic curve supports a maximum of 10 valid points.
P/Pn(%)	When configuring the curve, ensure that the P/Pn(%) value of a point is greater than the P/Pn(%) value of the previous point. Otherwise, the message indicating invalid input will be displayed.
cosφ

Q-U Hysteresis Curve (CEI0-16)

Configure the characteristic curve under instructions from professionals to ensure that the inverter or Smart PCS works properly.

The Q-U hysteresis curve (CEI0-16) control mode is the Italian standard CEI0-16 version of the Q-U characteristic curve. It dynamically adjusts the output reactive power of the inverter or Smart PCS in accordance with the ratio of the actual voltage to the rated voltage. The target value of reactive power adjustment should be in the form of Q/S.

Parameter	Description
Reactive power control mode	Set this parameter to Q-U hysteresis curve(CEI0-16).
Reactive power adjustment time	Specifies the change interval of the reactive power at the grid-connection point.
Trigger power percentage	Under a specific grid code, the characteristic curve takes effect only when the actual output active power of the device is greater than the specified value.
Exit power percentage	Under a specific grid code, the characteristic curve becomes invalid when the actual output active power of the device is less than the specified value.
Limit value for minimum PF	Limits the actual minimum PF when the Q-U characteristic curve takes effect.
U/Un (%)	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 message indicating invalid input will be displayed. When configuring the curve, ensure that the Q/S values at points A and B are the same and set in sequence, and that the Q/S values at points C and D are the same and set in sequence. Otherwise, a message indicating invalid input is displayed.
Q/S

Remote Communication Scheduling

The management system or independent power adjustment device sends scheduling commands over the communications port that supports Modbus TCP or IEC 104, without the need of user configuration or operation. The SmartLogger can automatically switch between scheduling modes and send scheduling commands.

Parameter	Description
Reactive power control mode	As the Remote communication scheduling mode has a higher priority, the SmartLogger automatically changes Reactive power control mode to Remote communication scheduling after receiving a scheduling command from the upper-layer management system. If this parameter is set to Remote communication scheduling, the SmartLogger parses the scheduling command delivered by the upper-layer management system to valid instruction data that can be identified by the devices in the plant and delivers the data to all devices connected to the SmartLogger.
Shut down solar inverter upon reactive power scheduling timeout	The default value is Disable. If this parameter is set to Enable, the SmartLogger shuts down the device after the SmartLogger has failed to receive remote communication scheduling commands for a period longer than the set value of Reactive power scheduling timeout threshold for triggering solar inverter shutdown.
Reactive power scheduling timeout threshold for triggering solar inverter shutdown	The default value is 300. This parameter is used only for shutdown protection when the communication for reactive power scheduling is abnormal. If the SmartLogger has failed to receive remote communication scheduling commands for a period longer than the set value, the communication is determined as abnormal.
Start up solar inverter upon recovery from reactive power scheduling timeout	The default value is Enable. If this parameter is set to Enable, after a reactive power signal timeout occurs, if the reactive power signal recovers, the device automatically starts.
Limit solar inverter power upon reactive power scheduling timeout	The default value is Disable. If this parameter is set to Enable, the SmartLogger controls the device in the following ways after the SmartLogger has failed to receive remote communication scheduling commands for a period longer than the set value of Reactive power scheduling timeout threshold for triggering solar inverter power limiting. Limit the reactive power of the inverter based on the value of Q/S during power limiting of solar inverter in case of reactive power scheduling timeout. Limit the reactive power of the PCS based on the value of Q/S during power limiting of ESS in case of reactive power scheduling timeout.
Reactive power scheduling timeout threshold for triggering solar inverter power limiting (s)	The default value is 300.0. This parameter is used only for reactive power limiting protection when the communication is abnormal. If the SmartLogger has failed to receive remote communication scheduling commands for a period longer than the set value, reactive power limiting protection is started.
Q/S during power limiting of solar inverter in case of reactive power scheduling timeout (%)	The default value is 0.000. After Limit solar inverter power upon reactive power scheduling timeout is enabled, if the SmartLogger has failed to receive remote communication scheduling commands for a period longer than the set value of Reactive power scheduling timeout threshold for triggering solar inverter power limiting, the SmartLogger limits the reactive power of the inverter based on the set value of this parameter.
Q/S during power limiting of ESS in case of reactive power scheduling timeout (%)	The default value is 0.000. After Limit solar inverter power upon reactive power scheduling timeout is enabled, if the SmartLogger has failed to receive remote communication scheduling commands for a period longer than the set value of Reactive power scheduling timeout threshold for triggering solar inverter power limiting, the SmartLogger limits the reactive power of the ESS based on the set value of this parameter.

If the communication between the SmartLogger and the scheduling backend is disconnected and the communication exception protection parameters are not set to Enable, the reactive power is controlled based on the scheduling command sent before the disconnection.

Power Factor Closed-Loop Control (Old Policy)

Before setting the parameters, ensure that the power meter is correctly connected to the SmartLogger.

Parameter	Description
Reactive power control mode	Set this parameter to Power factor closed-loop control (old policy).
Target power factor	Specifies the target value for the adjustment power factor of the power meter.
Adjustment period	Specifies the interval for sending adjustment commands by the SmartLogger.
Adjustment deadband	Specifies the adjustment power factor precision. NOTICE: This parameter is valid only when the power factor of the power meter is greater than 0.9.

Power Factor Closed-Loop Control

To improve the revenue, a plant needs to reduce or avoid the power factor surcharge by performing distributed reactive power compensation. To enable the function, set the parameters related to power factor closed-loop control.

You are advised to choose Settings > Smart Reactive Power Compensation to enable smart reactive power compensation.
For versions earlier than SmartLogger V300R023C00SPC160, before setting the parameters, ensure that the license for smart reactive power compensation has been loaded on the Maintenance > License Management page.
Before setting the parameters, ensure that the power meter is correctly connected to the SmartLogger.

Parameter	Description
Reactive power control mode	Set this parameter to Power factor closed-loop control.
Electric meter power direction	Positive: default value. Cables are correctly connected to the meter. If cables are reversely connected to the meter and the NMS does not support reverse connection^[1], set Meter access direction^[2] to Reverse and Electric meter power direction to Positive. Reverse: applicable to export+import meters. If cables connected to the meter are in reverse polarity and the NMS supports reverse connection, set Meter access direction to Reverse_Report raw data and Electric meter power direction to Reverse.
Power meter	Set this parameter to Smart meter.
Target power factor	Specifies the target value for the adjustment power factor of the power meter. The target value shall be larger than the appraisal value of the plant power factor.
Adjustment period	Specifies the interval for sending adjustment commands by the SmartLogger.
Adjustment deadband	Specifies the adjustment power factor precision. NOTICE: This parameter is valid only when the power factor of the power meter is greater than 0.9.
Reactive compensation delay	Specifies the delay time for starting the distributed power factor compensation if the current power factor is lower than the target power factor.
Note [1]: If cables connected to the meter are in reverse polarity and the management system can correctly display the real-time data of the meter, it is considered that the management system supports reverse connection. That is, the management system reverses the active power, reactive power, power factor, phase A active power, phase B active power, and phase C active power, replaces the total positive active energy and total negative active energy with each other, and replaces the total positive reactive power and total negative reactive power with each other. Note [2]: Meter access direction is set in the meter running parameters.

When the SmartLogger receives a remote reactive power scheduling command from the plant, it automatically changes Reactive power control mode to Remote communication scheduling. If power factor closed-loop control is required, set Reactive power control mode to Power factor closed-loop control and set the target power factor correctly.

PF-U Characteristic Curve

Configure the characteristic curve under instructions from professionals to ensure that the inverter or Smart PCS works properly.

In the PF-U characteristic curve control mode, the inverter or Smart PCS dynamically adjusts the PF at the device port based on the ratio U/Un(%) of the actual grid voltage to the rated grid voltage.

Parameter	Description
Reactive power control mode	Set this parameter to PF-U characteristic curve.
Characteristic curve points	Specifies the number of points on the characteristic curve. The characteristic curve supports a maximum of 10 valid points.
U/Un (%)	When configuring the curve, ensure that the U/Un(%) value of a point is greater than that of the previous point. Otherwise, the "Invalid input" message will be displayed.
PF

Q-P Characteristic Curve

Configure the characteristic curve under instructions from professionals to ensure that the inverter or Smart PCS works properly.

In the control mode of the Q-P characteristic curve, the inverter or Smart PCS adjusts the ratio Q/Pn of the output reactive power to the rated power based on the ratio P/Pn of the current active power to the rated power.

Parameter	Description
Reactive power control mode	Set this parameter to Q-P characteristic curve.
Reactive power adjustment time	Specifies the change interval of the reactive power at the grid-connection point.
Characteristic curve points	Specifies the number of points on the characteristic curve. The characteristic curve supports a maximum of 10 valid points.
P/Pn	When configuring the curve, ensure that the P/Pn value of a point is greater than that of the previous point. Otherwise, the "Invalid input" message will be displayed.
Q/Pn

No Output
DI Reactive Scheduling
Reactive Power Fix Control
Power Factor Fix Control
Q-U Characteristic Curve
cosφ-P/Pn Characteristic Curve (Inverter/PCS)
Q-U Hysteresis Curve (CEI0-16)
Remote Communication Scheduling
Power Factor Closed-Loop Control (Old Policy)
Power Factor Closed-Loop Control
PF-U Characteristic Curve
Q-P Characteristic Curve

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Update Date：2025-08-30

Document ID：EDOC1100108365

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SmartLogger3000 User Manual

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Setting Reactive Power Control

No Output

DI Reactive Scheduling

Reactive Power Fix Control

Power Factor Fix Control

Q-U Characteristic Curve

cosφ-P/Pn Characteristic Curve (Inverter/PCS)

Q-U Hysteresis Curve (CEI0-16)

Remote Communication Scheduling

Power Factor Closed-Loop Control (Old Policy)

Power Factor Closed-Loop Control

PF-U Characteristic Curve

Q-P Characteristic Curve

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