Parameterizable Bandstop Filters For Active Infeed Controls In Chassis Format - Siemens SINAMICS S120 Function Manual

2.1.8

Parameterizable bandstop filters for Active Infeed Controls in chassis format

Parameterizable bandstop filters that can be used to dampen system resonance are
available for the current control loop. The main application for these bandstop filters is in
weak networks in which the resonance point of the line filter can drop to one quarter of the
controller frequency. Resonance effects in oscillating line supplies can be suppressed with
the aid of these bandstop filters.
"Additional closed-loop controls" function module
The bandstop filters are managed in the "Additional closed-loop controls" function module.
Activating the function module
1. Mark the infeed in the project navigator and open the "Properties" context menu.
2. Click the "Function modules" tab.
3. Activate the "Additional closed-loop controls" function module in the function modules
Setting the bandstop filters
Because the same filter algorithms are involved, the settings of the bandstop filters are
always comparable with the settings of the current setpoint filters (see Section Current
setpoint filters (Page 103)).
To prevent resonance effects for nets with low short-circuit power (small RSC), a bandstop
filter (with defined notch depth) for approx. 0.25-fold controller frequency (see p0115) is
chosen typically. Appropriate values for the attenuation are preset for the numerator and the
denominator. Only the natural frequencies for the numerator and the denominator may need
to be adapted.
You can configure the parameterizable bandstop filters for the Active Infeed using the
following parameters:
● Negative phase-sequence system control (p3639 ff)
● Fixed setpoints (p2900 ff)
● Output voltage setpoint filter; activation with p5200.0 = 1
● Actual current value filter; activation with p5200.2 = 1
● Vdc actual value filter; activation with p1656.4 = 1
Drive functions
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
The "Object properties" dialog then opens.
selection with a mouse click.
Infeed
2.1 Active Infeed
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