Huawei SDongleA-01 User Manual page 50

FusionSolar Smart PV Management System
Connection
User Manual (Inverters + SDongleA)
Parameter
Maximum
protection time
Power control
hysteresis
Fail-safe power
threshold
Grid Closed-loop
connection controller
with limited
power (kW)
Limitation mode
PV plant capacity
Issue 02 (2021-11-25)
N/A
N/A
N/A
● SDongle/
SmartLogger
● Inverter
● Total power
● Single-phase power
N/A
Copyright © Huawei Technologies Co., Ltd.
5 Site Deployment and Commissioning
Description
● 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.
Specifies the dead zone for adjusting
the inverter output power. If the
power fluctuates within the power
control hysteresis, the power is not
adjusted.
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.
● For a single inverter: When the
Smart Dongle is connected, set
Closed-loop controller to
Inverter. When the inverter is
directly connected, Closed-loop
controller to Inverter. When the
SmartLogger is connected, set
Closed-loop controller to
SDongle/SmartLogger.
● For multiple inverters, Closed-
loop controller can only be set to
SDongle/SmartLogger.
● When this parameter is set to
Total power, no backfeeding
occurs on the three phases.
● When this parameter is set to
Single-phase power, no
backfeeding occurs on the phase
with the maximum power.
Specifies the total maximum active
power in the inverter cascading
scenario.
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