Parameter Description
HVRT compensation power
factor of reactive power in
positive sequence
During HVRT, the solar inverter needs to generate positive-
sequence reactive power to support the power grid. This
parameter is used to set the positive-sequence reactive power
generated by the solar inverter.
For example, if you set HVRT compensation power factor of
reactive power in positive sequence to 2, the positive-
sequence reactive current generated by the solar inverter is
20% of the rated current when the AC voltage increases by
10% during HVRT.
HVRT compensation power
factor of reactive power in
negative sequence
During HVRT, the solar inverter needs to generate negative-
sequence reactive power to support the power grid. This
parameter is used to set the negative-sequence reactive power
generated by the solar inverter.
For example, if you set HVRT compensation power factor of
reactive power in negative sequence to 2, the negative-
sequence reactive current generated by the solar inverter is
20% of the rated current when the AC voltage increases by
10% during HVRT.
Grid voltage protection shield
during VRT
Species whether to shield the undervoltage protection
function during LVRT or HVRT.
VRT exit hysteresis threshold Species the LVRT/HVRT recovery threshold.
● This parameter is displayed when LVRT is set to Enable.
● For example, if this parameter is set to 2, the reactive
power generated by the inverter is 20% of the rated power
when the AC voltage drops by 10% during LVRT.
Zero current due to power grid
fault
Certain countries and regions have requirements on the output
current during high/low voltage ride-through. In this case, set
this parameter to Enable. After this parameter is set to
Enable, the output current is less than 10% of the rated
current during high/low voltage ride-through.
This parameter is displayed when LVRT or HVRT is set to
Enable.
Active islanding protection Species whether to enable the active islanding protection
function.
Voltage rise suppression The standards of certain countries and regions require that
when the output voltage exceeds a certain value, the inverter
must suppress voltage rise by outputting reactive power and
reducing active power.
Communication interruption
duration (min)
Species the duration for determining communication
interruption. Used for automatic shutdown for protection in
case of communication interruption.
Soft start time (s) Species whether to enable the active islanding protection
function.
SUN2000-(100KTL, 110KTL, 125KTL) Series
User Manual 7 Man-Machine Interactions
Issue 07 (2020-09-15) Copyright © Huawei Technologies Co., Ltd. 93
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