User's Manual

Table Of Contents
SmartLogger3000
User Manual
6 WebUI Operations
Issue 04 (2020-03-11)
Copyright © Huawei Technologies Co., Ltd.
93
Parameter
Description
String monitor
The inverter monitors PV strings in real time. If any PV string is abnormal
(such as the PV string is shaded or the electric energy yield decreases), the
inverter generates an alarm to remind maintenance personnel to maintain
the PV string in a timely manner.
If PV strings are often shaded, you are advised to set String monitor to
Disable to prevent false alarms.
String detection low power delay
(min)
Specifies the delay time for generating abnormal string alarms when the
inverter detects that a PV string is working with low power. This parameter
is mainly used in the scenario where PV strings are shaded for a long time
in the morning and evening, and is used to prevent false alarms.
String detection high power
delay (min)
Specifies the delay time for generating abnormal string alarms when the
inverter detects that a PV string is working with high power.
String detection power segment
division percentage (%)
Specifies the thresholds for determining whether a PV string is working
with high power or low power. This parameter is used to distinguish the
working status of PV strings.
String detection reference
asymmetric coefficient
Specifies the threshold for determining PV string exception. The false
alarms caused by fixed shadow shading can be controlled by changing this
parameter.
String detection starting power
percentage (%)
Specifies the threshold for starting PV string exception detection. The false
alarms caused by fixed shadow shading can be controlled by changing this
parameter.
OFF at 0% power limit
If this parameter is set to Enable, the inverter shuts down after receiving
the 0% power limit command. If this parameter is set to Disable, the
inverter does not shut down after receiving the 0% power limit command.
Maximum apparent power
(kVA)
Specifies the output upper threshold for the maximum apparent power to
adapt to the capacity requirements of standard and customized inverters.
Maximum active power (kW)
Specifies the output upper threshold for the maximum active power to adapt
to different market requirements.
Adjust total energy yield (kWh)
Specifies the initial energy yield of the inverter. This parameter is used in
inverter replacement scenarios. Set the initial energy yield of the new
inverter to the total energy yield of the old inverter to ensure continuous
statistics of cumulative energy yield.
Duration for determining
short-time grid disconnection
(ms)
The standards of certain countries and regions require that the inverter
should not disconnect from the power grid if the power grid experiences a
short-time failure. After the fault is rectified, the inverter output power
needs to be quickly restored.
Buzzer
If this parameter is set to Enable, the buzzer sounds when the DC input
cable is incorrectly connected. If this parameter is set to Disable, the buzzer
does not sound when the DC input cable is incorrectly connected.
LVRT
LVRT is short for low voltage ride-through. When the grid voltage is
abnormally low for a short time, the inverter cannot disconnect from the
power grid immediately and has to work for some time.