Huawei SmartLogger3000 User Manual page 109

SmartLogger3000
User Manual
Parameter
Working mode
Maximum system DC-to-ground
withstand voltage
AC-to-ground resistance alarm
threshold
Compensation offset voltage
Clear data
Issue 03 (2020-01-10)
Description
Specifies the working mode of the PID module.

Manual mode: The PID module provides output based on Output
voltage (manual).
 Automatic mode: The PID module operates automatically after the PID
module, solar inverter, and SmartLogger communicate with each other
properly.
NOTE

To check whether the PID module functions properly, it is recommended that
Operation Mode be set to Manual upon first power-on.

After checking that the PID module functions properly, set Operation Mode to
Automatic.
Specifies the voltages between the PV side and PE and between the AC side
and ground in normal mode.
Specifies the lower thresholds of the maximum voltage ranges between the
inverter DC side (including the inverter, PV module, cable, SPD, and
switch) and ground in a PV power system.
The default value is 1000 V. For the 1500 V inverter, the recommended
value is 1500 V.
Specifies the alarm threshold for the impedance between the AC side of the
PID module and ground.
You can set an alarm threshold for the impedance between the AC grid and
ground for the PID module. If the detected impedance is below the
threshold, the PID module will generate an alarm.
Specifies the compensation offset voltage between PV and PE after the PID
module operates stably.
The value ranges from 0–500 V, and the default value is 50 V.
 If the PV module compensation voltage direction is set to PV– positive
offset, the value indicates the positive voltage between PV– and the
ground, and the compensation range is 0–500 V.

If PV module compensation voltage direction is set to PV+ negative
offset, the value indicates the negative voltage between PV+ and
ground, and the compensation –500 V to 0 V.
NOTE
 If Compensation offset voltage is set to 500 V, the PID module provides the
maximum output to enhance the voltage compensation effect. The output voltage
amplitude of the PID module is automatically capped to ensure the safety of a PV
power plant. The output voltage amplitude is also related to the maximum system
DC-to-ground withstand voltage and maximum output voltage.
 After this parameter is set and the PID module works properly, use a multimeter
that is set to the DC position to measure the voltage between the PV input terminal
of the SUN2000 and ground. (For PV– positive offset, check whether the voltage
between PV– and ground is greater than or equal to 0 V. For PV+ negative offset,
check whether the voltage between PV+ and ground is equal to or less than 0 V.)
Clears the active alarms and historical alarms stored on the PID module.
You can select Clear data to clear active alarms and historical alarms for
the PID module.
Copyright © Huawei Technologies Co., Ltd.
6 WebUI Operations
101