R.7.5
Date Code 20111215 Reference Manual SEL-421 Relay
Synchrophasors
Introduction
Synchronized Phasor Measurement Settings
MFRMT := C37.118 MRATE := 60 PMAPP := F PHCOMP := Y
PMSTN := "LOCAL RTC"
PMID := 4
PHDATAV := V1 VCOMP := 0.00 PHDATAI := NA IWCOMP := 0.00
IXCOMP := 0.00 PHNR := F PHFMT := P FNR := F
NUMANA := 0 NUMDSW := 0
TREA1 := NA
TREA2 := NA
TREA3 := NA
TREA4 := NA
PMTRIG := NA
MRTCDLY := 100
RTCRATE := 60
Time and Date Management
IRIGC := C37.118
Figure 7.5 Local Relay Global Settings
Set the port settings for the port that sends the synchrophasor data on the
remote relay, according to Figure 7.6.
Protocol Selection
PROTO := PMU
Communications Settings
SPEED := 57600 STOPBIT := 1 RTSCTS := N
SEL Protocol Settings
FASTOP := N
PMUMODE := SERVER
Figure 7.6 Remote Relay Port Settings
Set the port settings for the port that receives the synchrophasor data on the
local relay, according to Figure 7.7. Notice that the RTCID setting must match
the PMID setting of the remote relay.
Protocol Selection
PROTO := PMU
Communications Settings
SPEED := 57600 STOPBIT := 1 RTSCTS := N
SEL Protocol Settings
FASTOP := N
PMUMODE := CLIENTA
RTCID := 8
Figure 7.7 Local Relay Port Settings
Several Relay Word bits are useful for monitoring system status. Add
RTCCFGA and RTCDLYA to the SER.
The RTCCFGA Relay Word bit is asserted after the two relays have
communicated configuration data successfully. RTCCFGA deassertion
indicates that the system has changed, perhaps because of a setting change in
one of the relays.
If the RTCCFGA Relay Word bit indicates a new configuration, you can issue
the RTC command to ensure that the data being received have not changed.
The RTC command displays a description of the synchrophasor data being
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