•
SYNCH signal on the MUx function block indicates that protection functions
are blocked due to loss of internal time synchronization to the IED.
•
MUSYNCH signal on the MUx function block monitors the synchronization
flag
smpSynch
in the datastream and IED hardware time synchronization.
SMPLLOST indicates that merging unit data are generated by internal substitution
or one/more channel's Quality is not good or merging unit is in Testmode/detailed
quality=Test, IED is not in test mode.
Using external clock for time synchronization
This example is not valid when GPS time is used for differential
protection, when PTP is enabled or when the PMU report is used.
IED
MU
data
PPS
IEC/UCA 61850-9-2LE
PPS / IRIG-B
STATION
CLOCK
IEC10000074=2=en=Original.vsd
IEC10000074 V2 EN-US
Figure 183:
Setting example with external synchronization
Settings on the local HMI under
Main menu/Configuration/Time/
Synchronization/TIMESYNCHGEN:1/IEC61850-9-2
:
•
HwSyncSrc
: set to
PPS/IRIG-B
depending on available outputs on the clock.
•
SyncLostMode
: set to
Block
to block protection functions if time
synchronization is lost.
•
SyncAccLevel
: can be set to
4μs
since this corresponds to a maximum phase
angle error of 0.072 degrees at 50Hz.
•
fineSyncSource
: should be set to
IRIG-B
if available from the clock. If
PPS
is
used for
HWSyncSrc
, “full-time” has to be acquired from another source. If
station clock is on the local area network (LAN) and has an sntp-server, this is
one option.
Two status monitoring signals can be:
Section 18
1MRK 506 375-UEN A
Station communication
436
Railway application RER670 2.2 IEC
Application manual
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