Performing Additional Parameter Settings In The Expert List - Siemens SINAMICS S120 System Manual

Commissioning
7.4 Commissioning example for an infeed with voltage and frequency control for an island grid.
7.4.6

Performing additional parameter settings in the expert list

The following table provides an overview of the most important adjustable parameters with
typical values and notes for an island grid application.
This overview should provide help when commissioning the system. It does not replace the
information in the previous chapters or the parameter descriptions and function charts in the
List Manual.
Depending on the application, in individual cases, it may be necessary to change
parameters, which are not listed in the tables.
Parameter settings for "INFEED" drive unit
In the project, right click on "INFEED" under "Infeeds" and then select "Expert list".
Table 7- 4 Parameter settings for "INFEED" drive unit
Parameter Value
p0210 e.g. 400 V or 690 V
p0840[0] e.g. INFEED.r2090.0
p0844[0] e.g.
CONTROL_UNIT.r0722.0
p0852[0] e.g. fixed value 1
p0860 e.g.
CONTROL_UNIT.r0722.1
p0861 e.g. 200 ms
Pulse frequency wobbulation
p1810.2 Yes
1)
74
Comment
Enter the grid-side connection voltage for the grid converter
Rated voltage at the generator side of the transformer/at the connection point of
the Active Interface Module.
BI: On/Off1 via PROFIdrive PZD1, bit 0
Switch-on command for the Active Line Module or the beginning of the DC link
precharging
BI: 1.OFF2 in CDS 0 via DI0 (-X122.1) of the Control Unit
Signal sink for the OFF2 command of the Active Line Module
BI: Enable operation
After p0840 = 1, without this operating enable signal, the Active Line Module
would remain in the ready state after precharging has been completed. Further,
the enable signal is required for transformer magnetization.
BI: Grid contactor, feedback signal
The feedback signal contact of the circuit breaker must be connected in order that
the transformer magnetization function operates correctly. For this example, a
connection is made to terminal DI1 (-X122.2) of the Control Unit.
Line contactor monitoring time
1)
Monitors activation/feedback signal from the generator switch.
The value to be set depends on the switching times of the switch being used.
Activate pulse frequency wobbulation (access level 4)
Wobbulating (sweeping) the pulse of frequency ensures that the pulse-frequency
voltage and current components are distributed over a frequency range. This
makes sense if the distortion power at the individual frequencies should be re-
duced between 2 kHz and 9 kHz. This frequently applies to island grids.
System Manual, 04/2015, A5E03347436A
Grid infeed