B String Access Detection
Function Description
● Applies to large-scale commercial ground PV plants with PV strings facing the
same direction.
● In AC or DC power limiting scenarios:
– If the PV string access type is not
identied, the value of PV Status will
keep being displayed as Not connected. The PV string access type can be
identied only when the 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
identied, when some PV strings
connected to the 2-in-1 terminals are lost, no alarm will be generated. If
some PV strings connected to the 2-in-1 terminals are restored, the
access type cannot be
identied. It can be determined whether all the 2-
in-1 PV strings are restored only when the string current reaches Startup
current for 2 in 1 detection.
Procedure
Step 1 Log in to the SUN2000 app as Advanced User. The initial password is 00000a.
Use the initial password upon rst power-on and change it immediately after login. To
ensure account security, change the password periodically and keep the new password in
mind. Not changing the initial password may cause password disclosure. A password left
unchanged for a long period of time may be stolen or cracked. If a password is lost, devices
cannot be accessed. In these cases, the user is liable for any loss caused to the PV plant.
Step 2 Choose Function Menu > Maintenance > String Access Detection to go to the
parameter setting screen.
SUN2000-(196KTL-H0, 200KTL-H2, 215KTL-H0)
Series
User Manual B String Access Detection
Issue 07 (2021-07-08) Copyright © Huawei Technologies Co., Ltd. 110
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