2.7 Circuit breaker synchronisation
51
6MD665 Manual
C53000-G1876-C103-3
2.7.1
SYNC Function group 1
The SIPROTEC
®
4 device 6MD665 has configuration options for eight different syn-
chronisation functions. The function and operation is described in the following using
the
6<1&IXQFWLRQ
. Special features of SYNC functions 6 to 8 are compiled sep-
arately.
2.7.1.1
Description
Functioning
The synchronisation function is used for connecting two subnetworks in a substation
control system or for operational switch on or on the protection level after a three-pin
short or long interruption. The synchronisation function ensures that the connection is
only performed if both subnetworks are synchronous to each other or the deviation is
within the defined limits.
The connection is performed if the following conditions are met at the moment of
establishing the isolated connection:
• Voltage magnitudes
8PLQ
< | V | <
8PD[
• Difference of voltage magnitudes |
∆
V | <
∆
8PD[
• Frequencies
IPLQ
≤
f
≤
IPD[
• Difference of frequencies
∆
f <
∆
IPD[
• Difference of angles
∆
α
<
∆
α
max
For safety reasons, connection is only permitted below the curve shown in the diagram
for large differences in frequency and long circuit-breaker operating times.
Figure 2-18
Maximum permissible difference in frequency as a function of the circuit-breaker
operating time
Содержание SIPROTEC 6MD665
Страница 8: ...Preface vi 6MD665 Manual C53000 G1876 C103 3 ...
Страница 14: ...Contents vi 6MD665 Manual C53000 G1876 C103 3 ...
Страница 140: ...3 Installation and Commissioning 126 6MD665 Manual C53000 G1876 C103 3 ...
Страница 166: ...4 Technical Data 152 6MD665 Manual C53000 G1876 C103 3 ...
Страница 201: ...A 9 Group Alarms 187 6MD665 Manual C53000 G1876 C103 3 A 9 Group Alarms No Description No Description ...
Страница 210: ...Literature 196 6MD665 Manual C53000 G1876 C103 3 ...
Страница 222: ...Index 208 6MD665 Manual C53000 G1876 C103 3 ...