[synchronisierfunktion-arbeitsbereichfuerspgund-freq-150502-kn, 1, en_GB]
Figure 2-34
Operating range under synchronous and asynchronous conditions for voltage (U) and
frequency (f)
Synchrocheck
Addresses 6150
dU SYNC U2>U1
(permissible voltage difference, if U2 is greater than U1) and 6151
dU
SYNC U2<U1
(permissible voltage difference, if U2 is smaller than U1) can be used to set the permissible
voltage differences asymmetrically. The availability of two parameters enables an asymmetrical release to be
set.
The parameters 6152
df SYNC f2>f1
(permissible frequency difference, if f2 is greater than f1) and 6153
df SYNC f2<f1
(permissible frequency difference, if f2 is smaller than f1) determine the permissible
frequency differences. The availability of two parameters enables an asymmetrical release to be set.
The parameters 6154
dα SYNC α2> α1
(permissible angle difference, if α2 is greater than α1) and 6155
dα
SYNC α2< α1
(permissible angle difference, if α2 is smaller than α1) confine the operating range for
synchronous switching. The availability of two parameters enables an asymmetrical release to be set.
The preset parameters were selected for the application “Enabling for manual synchronisation of a generator”
and correspond to the parameters as for asynchronous conditions. The angle setting relates to the admissible
angle error which a generator still tolerates without excessive stress. Setting is to be done in accordance with
generator.
10°
is a typical value.
With frequency difference of 0.1 Hz at 10°, the time interval to the instant of synchronization is 10°/0.1 Hz ·
360° = 280 ms. Within this time period the manual close command should occur. The operating time of the
device 7VE61 and 7VE63 is approx. 10 ms. With an assumed circuit breaker closing time of 60 ms, approx. 2.5°
before the synchronizing instant the manual ON command must occur.
With the 1
1
/
2
channel version of the 7VE61, the synchrocheck function operates as an enable criterion and is
set coarsely in the monitoring limits. Therefore the dependences for the setting values of the forward angle
are Δα, permissible frequency difference Δf and circuit breaker closing time T
E
according to the following
formula:
[abhaengigkeit-alpha-f-te-170603-kn, 1, en_GB]
Functions
2.2 Paralleling Functions
SIPROTEC 4, 7VE61 and 7VE63, Manual
69
C53000-G1176-C163-3, Edition 10.2017
Summary of Contents for SIPROTEC 4 7VE61
Page 8: ...8 SIPROTEC 4 7VE61 and 7VE63 Manual C53000 G1176 C163 3 Edition 10 2017 ...
Page 24: ...24 SIPROTEC 4 7VE61 and 7VE63 Manual C53000 G1176 C163 3 Edition 10 2017 ...
Page 142: ...142 SIPROTEC 4 7VE61 and 7VE63 Manual C53000 G1176 C163 3 Edition 10 2017 ...
Page 192: ...192 SIPROTEC 4 7VE61 and 7VE63 Manual C53000 G1176 C163 3 Edition 10 2017 ...
Page 222: ...222 SIPROTEC 4 7VE61 and 7VE63 Manual C53000 G1176 C163 3 Edition 10 2017 ...
Page 230: ...230 SIPROTEC 4 7VE61 and 7VE63 Manual C53000 G1176 C163 3 Edition 10 2017 ...
Page 256: ...256 SIPROTEC 4 7VE61 and 7VE63 Manual C53000 G1176 C163 3 Edition 10 2017 ...
Page 314: ...314 SIPROTEC 4 7VE61 and 7VE63 Manual C53000 G1176 C163 3 Edition 10 2017 ...
Page 316: ...316 SIPROTEC 4 7VE61 and 7VE63 Manual C53000 G1176 C163 3 Edition 10 2017 ...
Page 330: ...330 SIPROTEC 4 7VE61 and 7VE63 Manual C53000 G1176 C163 3 Edition 10 2017 ...