Danfoss Vacon NXP Applications Manual page 63

Description of parameters
For example, if drooping is 3.00% and active current is 50%, the DC voltage reference is
reduced by 1.5%. With drooping, paralleled units can be balanced by adjusting the
DCVoltReference to slightly different values.
2.2.3.2 DC Voltage Ramp Rate ID1199
This parameter defines the ramp rate for the DC voltage reference change. The rate is
defined as %/s.
By default the internal DC voltage reference is kept the same as the actual DC voltage
when the drive is in STOP state, or the operation mode is Island or Micro Grid. This is to
make the change to the AFE mode smoother when the change is done on the fly.
DC Reference
120 %
110 %
2.2.3.3 DC Voltage Reference Filter TC
By default the internal DC voltage reference is kept the same as the actual DC voltage
when the drive is in STOP state, or the operation mode is Island or Micro Grid. This is to
make the change to the AFE mode smoother when the change is done on the fly.
This will prevent over current and current spikes when the control mode is changed.
24-hour support: +358 (0)201 212 575 • Email: vacon@vacon.com
DC
Voltage
Actual
Reference
Power [%]
Figure 12.
Input Ref.
Internal Ref
5 % / s
2 s
Figure 13.
ID1760
vacon · 61
3 %
100 %
5