Huawei SmartLogger3000 User Manual page 104

SmartLogger3000
User Manual
Parameter
Underfrequency rise power
Frequency for triggering of
underfrequency rise power (Hz)
Power recovery gradient of
underfrequency rise (%/min)
Cutoff frequency of
underfrequency rise power (Hz)
Cutoff power of underfrequency
rise power (%)
Frequency for exiting of
underfrequency rise power (Hz)
PV String Access Detection
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Table 6-2 Parameter description
Parameter
PV String Access Detection
Issue 03 (2020-01-10)
Description
The standards of certain countries and regions require that if the power grid
frequency is lower than Frequency for triggering of underfrequency rise
power, the inverter needs to increase the active power output to help
increase the power grid frequency. In this case, set this parameter to
Enable.
Specifies the frequency threshold of Underfrequency rise power.
Specifies the recovery rate of Underfrequency rise power.
Specifies the cutoff frequency of Underfrequency rise power.
Specifies the cutoff power of Underfrequency rise power.
Specifies the exit frequency of Underfrequency rise power.
PV string access detection 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 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.
Parameter Description
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.
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