Siemens 6MD85 Manual page 402

Control Functions
6.4 Synchronization Function
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Δf set point for balancing
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Smoothing
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T close without balancing
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Release for the kick pulse
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Δf for the kick pulse
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Stabilization
Parameter: Balancing frequency f2
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Default setting (_:141) Balancing frequency f2 = off
With the parameter Balancing frequency f2, you specify whether you wish to issue balancing
commands for the frequency f2 on the generator side or not.
Parameter Value
off
balancing pulses
Parameter: T f pulse min
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Default setting (_:142) T f pulse min = 0.10 s
With the parameter T f pulse min, you set the minimum time of the control pulse. It corresponds to the
minimum time to which the frequency controller responds. Set the time to this limiting value. The default
setting is a practicable value.
Parameter: T f pulse max
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Default setting (_:143) T f pulse max = 1.00 s
With the parameter T f pulse max, you set the maximum time of the control pulse. The default setting is a
practicable value. This allows you to avoid overadjustment of the speed in case of major frequency differ-
ences.
Parameter: df/dt of the controller
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Default setting (_:144) df/dt of the controller = 1.00 Hz/s
With the parameter df/dt of the controller, you adjust the balancing commands to the controller.
This allows the set point value to be specified correctly. The control pulse is derived from the measured differ-
ential frequency, the setting value of the parameter df/dt of the controller, and the set point value
Δf set point for balancing. The default setting is a practicable value.
Use the following equation to estimate the duration of the balancing pulse:
[fo_frequency-adujsting-command, 1, en_US]
with:
df
Measured value
Δf set point for
balancing
df/dt of the controller Parameter for specifying the speed of set point value change
402
Description
If you select this setting value, no balancing commands are issued for the
frequency f2 on the generator side.
If you select this setting value, balancing commands are issued for the
frequency f2 on the generator side.
Measured differential frequency
Parameter for specifying the set point value for the frequency balancing
commands
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017