●
In AC or DC power limiting scenarios:
–
If the PV string access type has not been identified, PV string access type
will be displayed as Disconnection. The PV string access type can be
identified only when the solar inverters restore to the non-power limiting
state and the current of all connected PV strings reaches the startup
current.
–
If the PV string access type has been identified, when a certain PV string
connected to the 2-in-1 terminals is lost, no alarm will be generated. If a
certain PV string connected to the 2-in-1 terminals is restored, the access
type cannot be identified. You can determine whether both 2-in-1 PV
strings are restored only when the PV string current reaches Startup
current for 2-in-1 detection.
●
After setting the parameters, you can go to the Running Info. tab page to
check whether the PV string connection status is normal.
Table 6-6 Parameter description
Parameter
Parameter Description
PV String Access Detection PV String Access Detection is set to Disable by default. After solar
inverters are connected to the power grid, set PV String Access
Detection to Enable.
Startup current
When the current of all connected PV strings reaches the preset
value, the PV string access detection function is enabled.
NOTE
Startup current setting rules:
● Startup current = I
sc
(S
tc
) x 0.6 (rounded up). For details about I
sc
(S
tc
), see
the PV module nameplate.
● Default startup current (5 A): applicable to the scenarios where the short-
circuit current I
sc
(S
tc
) is greater than 8 A for the monocrystalline and
polycrystalline PV modules.
Startup current for 2-in-1
detection
When the current of a PV string reaches Startup current for 2-in-1
detection, the PV string is automatically identified as 2-in-1.
You are advised to retain the default settings.
PV string
N
access type
NOTE
N
is the DC input terminal
number of the solar inverter.
Set this parameter based on the type of the PV string connected to
DC input terminal
N
of the solar inverter. Currently, the options are
as follows: Automatic identification (default value), Disconnection,
Single PV string, and 2-in-1.
You are advised to retain the default value. If the value is incorrectly
set, the PV string access type may be incorrectly identified and
alarms may be generated by mistake for the PV string access status.
6.3.8.2 Tracking System
●
The web software versions corresponding to the WebUI screenshots in this
document are V300R001C00SPC050. The screenshots are for reference only.
●
If a PV string uses a tracking system with a controller, set tracking system
parameters on the Tracking System tab page.
SmartLogger3000
User Manual
6 WebUI Operations
Issue 10 (2022-08-20)
Copyright © Huawei Technologies Co., Ltd.
137
