Siemens SINAMICS S Manuel page 1220

Current pre-control
Active current setpoint
r0077
[8940.8]
Filter capacitance
p0221
<1>
Filter compensation
Reactive current
Supplementary setpoint
+
p3611
+
+
Reactive current
fixed setpoint
p3610
Reactive current setpoint
r0075
<1> Using the filter compensation, the reactive current requirement of a line filter is covered that is obtained dependent on the operating point as a result of its capacitance.
This means that the required reactive power is then not taken from the line supply.
<2> For p3603 = 0 the D component is disabled
1 2
DO: A_INF
Active infeed - power pre-control/current controller/gating unit (p3400.0 = 0)
Active current, actual value
r0078
[8950.1]
d
dt
Differentiator
d
dt
r0076
Differentiator
Reactive current actual value
[8950.1]
3 4
Closed-loop current control
Factor D component
p3603
<2>
Integral component
r3618
Kp Tn
– +
+
+
r3606
System deviation
Active curr. controller
Kp
p3615
Tn
p3617
System deviation
Kp Tn
r3608
+ +
–
Reactive curr. contr.
r3619
Integral component
<2>
p3603
Factor D component
5 6
fp_8946_01_eng.vsd
13.04.05 V02.04.00
p0115[0] (250.00 µs)
Active component Usd
r3632
[8950.1]
Reactive component Usq
r3633
[8950.1]
+
7 8
Function diagram
- 8946 -
SINAMICS S