Danfoss Vacon NXP Applications Manual page 109

Description of parameters
1 = Zero Power from Supply Frequency
This selection is only possible with unit FI9 and bigger.
The drive monitors the supply frequency by itself and uses this as a starting point for
power drooping control.
2 = Drooping
The drive does not control the power to zero but goes directly to the drooping control
with set parameters.
3 = Isochron Generator
The drive will follow the line frequency exactly, so the frequency change will not change
the power of the Micro Grid application. In this mode, power is controlled by the base
current reference.
2.11.5 Voltage Rise Time
This parameter defines the time until the voltage is at nominal when the drive is started
in Island mode or when in Micro Grid mode without an existing grid. Voltage Rise Time is
used to minimize inrush current e.g. when Grid Converter needs to magnetize
transformer on start.
5.11.1.1 Generator Simulation
These parameters are used to make drive operate more like diesel generator set.
P2.11.6 Generator Mechanical Time Constant
Simulated diesel generator mechanical time constant.
Values above zero will enable diesel generator simulation function. Use 1000 ms as a
starting point if actual mechanical time constant is not known.
P2.11.7 Generator Speed Control Kp
Simulated diesel generator speed control gain.
P2.11.8 Generator Speed Control Ti
Simulated diesel generator speed control Ti.
24-hour support: +358 (0)201 212 575 • Email: vacon@vacon.com
ID1541
ID1722
ID1723
ID1724
vacon · 107
5