Siemens SINAMICS S120 System Manual page 82

Commissioning
7.4 Commissioning example for an infeed with voltage and frequency control for an island grid.
Table 7- 5 Parameter settings for the drive device "MOTORINVERTER"
Parameter Value
p1200[0] e.g. 1
p1300[0] e.g. 20
p1501[0] e.g. 1
Technology controller
p3422
1)
p3510 e.g. 1035 V
for 690 V AC devices
p3511 e.g. INFEED.r5433
p3513 e.g. INFEED.r5402.0
p3520[0] e.g. INFEED.r0082
p3521[0] e.g. 80 %
p3523[0] e.g. 8 ms
p3560 e.g. 70 %
Values are system-specific and must be taken into special consideration when adapting to the particular system configu-
1)
ration.
82
Comment
Flying restart operating mode in DDS 0
Flying restart always active, start in setpoint direction
"Flying restart always active" is especially required for applications without en-
coder.
Open-loop/closed-loop control operating mode in DDS 0
Speed control (encoderless)
BI: Change over between closed-loop speed/torque control in CDS 0
1 signal = Closed-loop torque control
0 signal = Closed-loop speed control
Total DC link capacitance
Note:
set the same value as for INFEED.p3422 (after the DC link identification rou-
tine!)
DC link voltage setpoint
Standard setting: same value as for INFEED.p3510. If required, adapt so that
the modulation depth controller (INFEED.r5433) can operate within its limits.
CI: DC link voltage supplementary setpoint
Interconnect with the value "Modulation depth control output" of the infeed.
This BICO interconnection ensures that in grid droop operation of the Active
Line Module, the DC link voltage is adapted to the actual grid voltage; in turn,
this means minimum harmonic content of the grid voltage.
BI: Inhibit voltage-controlled operation
Interconnect to "Grid droop control inactive" signal from the infeed.
This BICO interconnection ensures that the motor inverter controls the DC link
voltage if the Active Line Module is in grid droop operation.
CI: DC link precontrol power
Interconnect to "Active power actual value" of the infeed.
DC link pre-control power scaling
It makes sense to precontrol the power demand in the DC link voltage control-
ler, especially when correcting grid-side load steps in grid droop operation. We
recommend a scaling of approx. 80 % to 100 %.
DC link pre-control power smoothing
It makes sense to precontrol the power demand in the DC link voltage control-
ler, especially when correcting grid-side load steps in grid droop operation. To
suppress high-frequency disturbing components, we recommend that the pre-
control signal is smoothed between 1 ms and 10 ms.
Vdc controller proportional gain
If a very high dynamic performance of the Vdc control is not required, then we
recommend a setting value of < 100 % to increase the ruggedness (stability) of
the controller.
System Manual, 04/2015, A5E03347436A
Grid infeed