[dw_build_frequency-adjusting-com, 1, en_US]
Figure 6-81 Generation of Balancing Commands for Frequency
If the speed (frequency) was adjusted in such a way that the differential frequency df ≈ is 0, the voltage
phasors of V1 and V2 are practically standing still. This can result in an angle difference that does not allow
any switching. A certain frequency difference is required for safe switching. A kick pulse is emitted to attain
this state. With the parameter Release for the kick pulse, you can control the generation of a kick
pulse. A kick pulse is only emitted if the frequency difference falls below the setting value for the parameter
f-threshold ASYN<->SYN. You can find the parameter f-threshold ASYN<->SYN in the entry block
Synchr. op.mode. The actuating time of the kick pulse is defined with the parameter Δf for the kick
pulse. The following equation applies:
[fo_frequency-adujsting-command_01, 1, en_US]
with:
tf
act
Pulse duration
Δf for the kick pulse
Parameter for default set point value for the kick pulse
df/dt of the controller
Parameter for adapting the balancing commands to the controller
The following figure shows the overall effect of the balancing commands:
Control Functions
6.4 Synchronization Function
394 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
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