Process Bus Iec/Uca 61850-9-2Le Synchronization - ABB RES670 Applications Manual

1MRK 511 407-UEN C
22.13.1.3
Phasor measurement unit RES670 2.2 IEC
Application manual
Setting example
GPS
PTP
Station bus
PTP
REC
PTP
9-2
Process bus
9-2
SAM600-TS
SAM600-CT
SAM600-VT
IEC16000167 V1 EN-US
Figure 123: Example system
Figure 123 describes an example system. The REC and REL are both using the 9-2
stream from the SAM600, and gets its synch from the GPS. Moreover, the REL
and REC both acts as a boundary clock to provide synch to the SAM600. The REL
contains a GTM card, which has a PPS output that is used to synchronize merging
units that are not PTP compliant. As a side effect, the GTM contains a GPS
receiver and the REL acts as a backup of the GPS on the station bus.
On all access points, the PTP parameter is "ON".
On the REL, the parameter FineSyncSource (under Configuration/Time/
Synchronization/TIMESYNCHGEN:1/General) is set to "GPS" if there is a
GPS antenna attached.
If the GTM is used as a PPS output only, the FineSynchSource is not set.

Process bus IEC/UCA 61850-9-2LE synchronization

When process bus communication (IEC/UCA 61850-9-2LE protocol) is used, it is
essential that the merging units are synchronized with the hardware time of the IED
(see Technical manual, section Design of the time system (clock synchronization) ).
To achieve this, PTP, PPS or IRIG-B can be used depending of the facilities of the
merging unit.
If the merging unit supports PTP, use PTP. If PTP is used in the IED and the
merging unit is not PTP capable, then synchronize the merging unit from the IED
PTP
REL GTM
PTP 9-2
9-2
PPS
9-2
MU
IEC16000167-1-en.vsdx
Section 22
Basic IED functions
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