SMA STP 15000TL - Manual (Page 41)

8.4 Activating String-Failure Detection
Identical alignment of the PV modules with activated string-failure detection
If you would like to activate the string-failure detection, the PV modules of input A and input B
must be aligned identically and the input voltage must be at least 188 V. Thus, reversed
polarity of the DC connection or a defective string will be recognized by the inverter.
• Ensure that all PV modules are aligned identically.
• Ensure that the input voltage is at least 188 V.
If identically aligned PV modules are connected to input A and input B of the inverter, you can
activate the self-learning string-failure detection and/or the substring-failure detection.
The basic procedure for changing operating parameters is explained in another section (see
Section 8.3 "Changing Operating Parameters", page 40).
Procedure:
• To activate string-failure detection, select the parameter Operating mode of string failure
detection or Op.PvProMod and set to Detect string failures or StrgFltDet.
• To activate string-failure detection and substring-failure detection, select the parameter
Operating mode of string failure detection or Op.PvProMod and set to Detect partial
string failures or PaStrgFltDet.
8.5 Setting the Active Power Limitation in case of PV
System Control Failure
You will need to set the active power limitation in case of PV system control failure if the active
power limitation of the inverter is controlled by a communication product. By setting the active
power limitation in case of PV system control failure, you ensure that the inverter will still feed the
maximum permissible PV power into the utility grid, even if communication between inverter and
communication product has failed.
The basic procedure for changing operating parameters is explained in another section (see
Section 8.3 "Changing Operating Parameters", page 40).
Requirements:
☐ The parameter Operating mode Active power must be set to the value Act. power lim.
via PV system ctrl.
☐ The firmware version of the inverter must be at least 2.62.04.R.
☐ The total installed PV power must be known.
☐ The active power feed-in specified by the grid operator must be known.
Default setting:
• STP 15000TL-10: 100%
• STP 17000TL-10: 100%
8 Configuration SMA Solar Technology AG
Operating Manual 41 STP15-17TL-10-BE-en-10