Prerequisites

• You have matched PV plant devices with the PV plant with the help of the installer.
• The inverter and Smart Dongle have been powered on and communicate properly with the management system.
• You have obtained the login account and password from the installer or Huawei service engineer. If no account or password is available, create an account.

Procedure

1. Enter the management system address https://intl.fusionsolar.huawei.com in the address box of the browser.
   • Browser: Chrome 67, Safari 9.0, Internet Explorer 11, or a later version is recommended.
   • The software version corresponding to the UI snapshots is SmartPVMS V500R007C00CP2101. The UI may vary by software versions and the screenshot is for reference only.

2. If you have obtained the login account and password from the installer or Huawei service engineer, enter them and click Log In to go to the home page. If you have not created an account and password, click Installer Registration, enter the registration information, and activate the account with the verification code sent to your email.
   Figure 5-17 Login page
   
   Figure 5-18 Registering an account
   

3. On the Home page, click the plant name to access the plant page. Choose Device Management, select Dongle, and click Set Parameters.
   Figure 5-19 Setting export limitation 1
   

   If multiple inverters are changed to one inverter, you need to perform device search again. On the plant page, choose Device Management, click Device Name of the Dongle, and select Search for Devices.

4. Choose Active Power Control and set related parameters.
   Figure 5-20 Setting export limitation 2
   
   Table 5-3 Active power control mode

   Parameter		Description
   No limit	-	If this parameter is set to No limit, the inverter output power is not limited and the inverter can feed its rated power to the power grid.
   Grid connection with zero power	Closed-loop controller	For a single inverter: When the Smart Dongle is connected, set Closed-loop controller to Inverter. When the inverter is directly connected, set Closed-loop controller to Inverter. For multiple inverters, Closed-loop controller can only be set to SDongle.
   	Limitation mode	Total power indicates export limitation of the total power at the grid-connection point. (When a single-phase meter is connected, only the Total power limitation mode can be selected.) Single-phase power indicates export limitation of the power in each phase at the grid-connection point.
   	Power lowering adjustment period	Specifies the shortest interval for a single export limitation adjustment.
   	Maximum protection time	Specifies the time for detecting power meter data. If the Smart Dongle does not detect any power meter data within the preset time, the Smart Dongle delivers the preset value of the Fail-safe power threshold to the inverter for protection. The recommended value is 5s or greater.
   	Power raising threshold	Specifies the dead zone for adjusting the inverter output power. If the power fluctuates within the power control hysteresis, the power is not adjusted. The recommended value is 1% to 2% of the inverter output power.
   	Fail-safe power threshold	Specifies the derating value of the inverter active power by percentage. If the Smart Dongle does not detect any power meter data or the communication between the Smart Dongle and the inverter is disconnected, the Smart Dongle delivers the derating value of the inverter active power by percentage.
   Grid connection with limited power (kW)	Closed-loop controller	For a single inverter: When the Smart Dongle is connected, set Closed-loop controller to Inverter. When the inverter is directly connected, set Closed-loop controller to Inverter. For multiple inverters, Closed-loop controller can only be set to SDongle.
   	Limitation mode	Total power indicates export limitation of the total power at the grid-connection point. (When a single-phase meter is connected, only the Total power limitation mode can be selected.) Single-phase power indicates export limitation of the power in each phase at the grid-connection point.
   	Maximum grid feed-in power (kW)	Specifies the maximum active power transmitted from the grid-connection point to the power grid.
   	Power lowering adjustment period	Specifies the shortest interval for a single export limitation adjustment.
   	Maximum protection time	Specifies the time for detecting power meter data. If the Smart Dongle does not detect any power meter data within the preset time, the Smart Dongle delivers the preset value of the Fail-safe power threshold to the inverter for protection. The recommended value is 5s or greater.
   	Power raising threshold	Specifies the dead zone for adjusting the inverter output power. If the power fluctuates within the power control hysteresis, the power is not adjusted. The recommended value is 1% to 2% of the inverter output power.
   	Fail-safe power threshold	Specifies the derating value of the inverter active power by percentage. If the Smart Dongle does not detect any power meter data or the communication between the Smart Dongle and the inverter is disconnected, the Smart Dongle delivers the derating value of the inverter active power by percentage.
   Grid connection with limited power (%)	Closed-loop controller	For a single inverter: When the Smart Dongle is connected, set Closed-loop controller to Inverter. When the inverter is directly connected, set Closed-loop controller to Inverter. For multiple inverters, Closed-loop controller can only be set to SDongle.
   	Limitation mode	Total power indicates export limitation of the total power at the grid-connection point. (When a single-phase meter is connected, only the Total power limitation mode can be selected.) Single-phase power indicates export limitation of the power in each phase at the grid-connection point.
   	PV plant capacity	Specifies the total maximum active power in the inverter cascading scenario.
   	Maximum grid feed-in power (%)	Specifies the percentage of the maximum active power of the grid-connection point to the PV plant capacity.
   	Power lowering adjustment period	Specifies the shortest interval for a single export limitation adjustment.
   	Maximum protection time	Specifies the time for detecting power meter data. If the Smart Dongle does not detect any power meter data within the preset time, the Smart Dongle delivers the preset value of the Fail-safe power threshold to the inverter for protection. The recommended value is 5s or greater.
   	Power raising threshold	Specifies the dead zone for adjusting the inverter output power. If the power fluctuates within the power control hysteresis, the power is not adjusted. The recommended value is 1% to 2% of the inverter output power.
   	Fail-safe power threshold	Specifies the derating value of the inverter active power by percentage. If the Smart Dongle does not detect any power meter data or the communication between the Smart Dongle and the inverter is disconnected, the Smart Dongle delivers the derating value of the inverter active power by percentage.
   Shutdown at high feed-in powera	Shutdown at high feed-in power	The default value is Disable. If this parameter is set to Enable, the inverter shuts down for protection when the grid-connection point power exceeds the threshold and remains in this condition for the specified time threshold.
   	Upper feed-in power threshold for inverter shutdown (kW)	The default value is 0. This parameter specifies the power threshold of the grid-connection point for triggering inverter shutdown.
   	High feed-in power duration threshold for triggering inverter shutdown (s)	The default value is 20. This parameter specifies the duration threshold of high feed-in power for triggering inverter shutdown. When High feed-in power duration threshold for triggering inverter shutdown is set to 5, Shutdown at high feed-in power takes precedence. When High feed-in power duration threshold for triggering inverter shutdown is set to 20, Grid connection with limited power takes precedence (when Active power control is set to Grid connection with limited power).
   Note a: This parameter is supported only for the AS4777 grid code.