CG Drives & Automation 01-7318-01r1 Functional description 133
Maximum Reactive Power (Q) in Under
Excitation [G222]
Sets the maximum limit of reactive power (Q) in under-
excited mode.
CosΦ control via the set point
(CosΦ fix) [G23]
This sub-menu provides the additional settings (over excited
and under excited CosΦ limits) when the displacement
power factor (CosΦ) reference is controlled via the set point
i.e. CosΦ reference is provided by the set point. Set point
can be configured locally through keyboard [310], from
remote (analogue input) or through serial communication.
Internally reactive power (Q) reference is calculated from the
set displacement power factor (CosΦ). For details read
section Reactive power (Q) support, section 7.17.2, page 41.
Minimum Displacement Power Factor
(CosΦ) In Over Excitation [G231]
Sets the minimum limit of displacement power factor
(CosΦ) in over-excited mode.
Minimum Displacement Power Factor
(CosΦ) In Under Excitation [G232]
Sets the minimum limit of displacement power factor
(CosΦ) in under-excited mode.
Q control as a function of grid voltage
Q(U) [G24]
AFR/AFG can support grid/network voltage in the event of
grid/network voltage variations by providing or consuming
the reactive power. For that, reactive power (Q) support can
be configured as a function of grid/network measured
voltage. Characteristics of reactive power (Q) support as a
function of measured grid/network voltage can be
configured using four configurable points. For details read
section Reactive power (Q) support, section 7.17.2. In this
menu, settings related Q-U characteristic curve can be
configured.
Reactive Power (Q1) At Voltage Level (U1)
[G241]
Desired reactive power support (Q1) at measured grid/
network voltage (U1) level.
NOTE:
Q
ref
[310] is additionally also limited by Q
max
[O41] as
shown in Fig. 37.
Default: -50%
Range: -100% - 0%
NOTE:
-ve Q value in [G222] indicates the under excited mode
and +ve sign indicates the over-excited mode.
NOTE:
Q
ref
[310] is additionally also limited by Q
max
[O41] as
shown in Fig. 37.
Default: 0.90
Range: 0.00 - 1.00
NOTE:
-ve Q sign in [G231] indicates the under excited mode
and +ve sign indicates the over-excited mode.
NOTE:
Calculated Q
ref
[310] is additionally also limited by
Q
max
[O41] as shown in Fig. 37.
Default: -0.90
Range: -1.00 - 0
NOTE:
-ve Q value in [G232] indicates the under excited mode
and +ve sign indicates the over-excited mode.
NOTE:
Calculated Q
ref
[310] is additionally also limited by
Q
max
[O41] as shown in Fig. 37.
Default: 50%
Range: -100% - 100%
NOTE:
-ve Q1 value in [G241] indicates the under excited mode
and +ve sign indicates the over-excited mode.
G232 CosΦ min ue
Stp -0.90
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