Huawei SmartLogger1000 User Manual page 190

SmartLogger1000
User Manual
No. Parameter
21 Upgrade
delay
22 String
monitor
23 String
detection low
power delay
24 String
detection
high power
delay
25 String
detection
power
segment
division
percentage
26 String
detection
reference
asymmetric
coefficient
Issue 12 (2019-01-15)
Description
This parameter is mainly used
in the upgrade scenarios where
the PV power supply is
disconnected at night due to no
sunlight or unstable at dawn or
dusk due to poor sunlight.
The inverter monitors PV
strings in real time. If any PV
string is abnormal (such as
being shaded or with decreased
energy yields), the inverter
generates an alarm to remind
maintenance personnel of
timely maintenance.
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.
Specifies the delay time for
generating abnormal string
alarms when the inverter detects
that a PV string is working with
high power.
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.
Specifies the threshold for
determining PV string
exception. The false alarms
caused by fixed shadow shading
can be controlled by changing
this parameter.
Copyright © Huawei Technologies Co., Ltd.
Unit Value Range
N/A  Disable

Enable
N/A  Disable

Enable
min [2, 720]
min [2, 720]
% [1, 100]

N/A SUN2000-
(8KTL-28
KTL):
[0.05, 1]
 Others: [5,
100]
7 WebUI
Remarks
After the inverter
upgrade starts, if
Upgrade delay is set
to Enable, the
upgrade package is
loaded first. After the
PV power supply
recovers and the
activation conditions
are met, the inverter
automatically
activates the upgrade.
If PV strings are
easily shaded, you are
advised to set String
monitor to Disable to
prevent false alarms.
This parameter is
displayed when
String monitor is set
to Enable.
This parameter is
displayed when
String monitor is set
to Enable.
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