Huawei SUN2000-90KTL Series User Manual page 91

SUN2000-(90KTL, 95KTL, 100KTL, 105KTL) Series
User Manual
Parameter
RCD enhancement
Night-time reactive power
output
PID protection at night
Power quality optimization
mode
PV module type
PID compensation direction
(or Crystalline silicon PV
compensation mode)
Issue 16 (2023-12-20)
Description
RCD refers to the residual current of the inverter to the ground.
To ensure device and personal safety, RCD should be limited to
the specified value in the standard. If an AC switch with a residual
current detection function is installed outside the inverter, this
function should be enabled to reduce the residual current
generated when the inverter is running, thereby preventing the
AC switch from misoperations.
In some specific application scenarios, a power grid company
requires that the inverter can perform reactive power
compensation at night to ensure that the power factor of the
local power grid meets requirements.
This parameter is displayed when Isolation settings is set to
Input ungrounded, with TF.
When the inverter outputs reactive power at night and this
parameter is set to Enable, the inverter will shut down
automatically if it detects abnormal status of the PID
compensation.
If this parameter is set to Enable, the inverter output current
harmonics will be optimized.
This parameter is used to set different types of PV modules and
the shutdown time of the concentration PV module. If the
concentration PV modules are shaded, the power drops drastically
to 0 and the inverter shuts down. The energy yield would be
affected since it takes too long for the power to resume and
inverter to restart. The parameter does not need to be set for
crystalline silicon and filmy PV modules.
● If this parameter is set to Crystalline silicon or Film, the
inverter automatically detects the power of PV modules when
they are shaded and shuts down if the power is too low.
● When concentration PV modules are used:
– If this parameter is set to CPV 1, the inverter can quickly
restart in 60 minutes if the input power of PV modules
drops drastically due to shading.
– If this parameter is set to CPV 2, the inverter can quickly
restart in 10 minutes if the input power of PV modules
drops drastically due to shading.
When the external PID module compensates the PID voltage for
the PV system, set Built-in PID compensation direction to the
actual compensation direction of the PID module so that the
inverter can output reactive power at night.
This parameter is displayed when PV module type is set to
Crystalline silicon. Select PV–positive offset for P-type PV
modules. Select PV+ negative offset for N-type PV modules.
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