Logic of the Stage
[lo_stage VBP, 1, en_US]
Figure 9-22
Logic Diagram of the Supervision Stage
The voltage inputs in the preceding figure are calculated with the following equations:
DVa
= |v(n)
ref.
| - |v(n)
main
|
DVb = |v(n)
main
| - |v(n)
ref.
|
DVc = |V
ref.
- V
main
|
DVd = Max. (V1
ref.
, V1
main
)
The following table shows the description of the voltages.
Table 9-1
Voltage Description
Voltages Description
v(n)
ref.
Sampled value of the reference voltage
v(n)
main
Sampled value of the main voltage
V
ref.
Fundamental value of the reference voltage
V
main
Fundamental value of the main voltage
V1
ref.
Positive-sequence value of the reference voltage
Supervision Functions
9.3 Supervision of the Secondary System
1268 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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