Hi there, Community!
This post describes the operation and maintenance instructions of the Export Limitation configuration on SmartLogger 1000A. Please see below for more details on the topic.
BACKGROUND INFORMATION
The Export Limitation feature is mainly used in the self-use scenario. The SmartLogger 1000A detects the active power of the grid-tied point electric meter, controls the active output of the inverter in a closed-loop manner, prevents the inverter output power from being transmitted to the power grid, and maximizes the inverter power generation for local load consumption.
SYSTEM NETWORK DIAGRAM
Without the DO control circuit breaker:
Note:
If the connected power meter model is UMG604, PD510, PZ96L, UPM209, or COUNTIS E43, select the corresponding model in the Intelligent Power Meter Type drop-down list box.
When the UPM209 or COUNTIS E43 power meter is connected to the SmartLogger1000A, a 120-ohm resistor needs to be connected to the RS485 bus of the meter. For details, see the user manual of the power meter.
COUNTIS E43: Not applicable to Load Imbalance.
CONNECTING THE INVERTERS
Write in a browser the following link: https://192.168.0.10 (default password 'Changeme') and login as Special User àMaintenance àConnect DeviceàAuto assign addressàSet start address to 1àAuto Assign Address.
After selecting Auto Assign Address, follow the below steps: confirm 'Start allocate address'àconfirm address needing adjustmentàAddress AdjustmentàConfirm.
Search result:
CONNECTING THE POWER METER
The power meter does not support automatic search and needs to be added manually.
Setting the RS485 communication port
As Special User from Settings menu set the ports where the power meter is connected: baud rate, parity, stop bit and start address-end address:
RS485-1 to RS485-3 correspond to the communications ports COM1 to COM3, and the default baud rate is 9600 bps. For the power meter connected to the corresponding RS485 port, the values of Protocol, Baud rate, Parity and Stop bit must be the same as those from user manual.
Adding the power meter
Connect the power meter in one of the RS485 porst of the SmartLogger1000A. As Special User, from the Maintenance menu choose Connect DeviceàAdd deviceàDevice Type Power MeteràComm. Protocol Modbus-RTUàset the Port number accordingly and the RS485 communication address of the Power MeteràAdd Devices.
Selecting the power meter type
As Special User, from the Settings menu choose Power meter, select the meter type and submit:
If the installed meter is not in the default list, you need to choose the type 'other' and set all the registers for the meter and submit:
Checking the power meter status
As Special User, from the Monitoring menu select the Meter and check the status:
If the power meter showes the status is disconnected, you need to check the physical connection and the communication parameters. The status of the power meter should be green and connected.
Disabling the active power control
As Special User, from the Settings menuàActive power controlàDisable active power controlàSubmit.
EXPORTING LIMITATION CONFIGURATION (WIZARD CONFIGURATION)
Confirming to the Power Meter
As Special User, choose SettingsàExport Limitation to access the target page. Check the meter port, type and the communication settings and choose Next:
Setting inverter parameters
1. Set active power change gradient.
2. 125%/s, if the maximum value range is 50%/s, set this parameter to 50%/s.
3. Enable the communication interruption shut down and communication resumed startup.
4. Select Batch configurations to set all the inverters and after that select Next.
Configuring Export Limitation parameters
Enable the function export limitation, set all the details and submit:
1. Select power meter.
2. Select the sense of the power meter: positive or reverse
3. Set maximum feed-in
4. Set the power raising threshold that should be always higher than maximum feed-in
5.Submit.
TROUBLESHOOTING
After you set export limitation and the function doesn’t work please check the next issue:
1. The meter should be installed at the consumption main point and not on a secondary consumption point.
2. Check if the electric meter power direction is set correctly. You can check the meter sense following the next steps:
Disable the function export limitation.
Stop all the inverters: choose maintenance menu and stop the inverters in batch.
Go to the Monitoring menu, select the meter and check the value of Active power. If the value is positive than set the electric meter power direction to positive. If the value is negative set the electric meter power direction to reverse.
3. Check the power raising threshold.
If you set the maximum grid feed-in power to 0 than you can set the raising threshold to 0.2.
If you set to 5KW than you need to set the threshold to 5.1.
After you check all of this, the function should work without a problem.
Contact the service team at eu_inverter_support@huawei.com to recommend you the power meter recommended for this function.
