H.11
Date Code 20150130 Instruction Manual SEL-787 Relay
Synchrophasors
C37.118 Synchrophasor Protocol
See Section 7: Communications for complete command options, and error
messages.
C37.118 Synchrophasor Protocol
The SEL-787 complies with IEEE C37.118, Standard for Synchrophasors for
Power Systems. The protocol is available on serial ports 2, 3, 4, and F by
setting the corresponding Port setting PROTO := PMU.
This subsection does not cover the details of the protocol, but highlights some
of the important features and options that are available.
Settings Affect
Message Contents
The SEL-787 allows several options for transmitting synchrophasor data.
These are controlled by Global settings described in Settings for
Synchrophasors on page H.4. You can select how often to transmit the
synchrophasor messages (MRATE) and which synchrophasors to transmit
(PHDATAV, PHDATAI, and PHCURR). The SEL-787 automatically includes
the frequency and rate-of-change-of-frequency in the synchrophasor
messages.
The relay can include as many as four user-programmable analog values in the
synchrophasor message, as controlled by Global setting NUMANA, and 0 or
16 digital status values, as controlled by Global setting NUMDSW.
The SEL-787 always includes the results of four synchrophasor trigger reason
SELOGIC equations TREA1, TREA2, TREA3, and TREA4, and the trigger
SELOGIC equation result PMTRIG, in the synchrophasor message.
SEL-787 Date: 02/05/2008 Time: 17:22:07
TRNSFRMR RELAY Time Source: External
Time Quality Maximum time synchronization error: 0.000 (ms) TSOK = 1
Synchrophasors
Phase Voltages Pos. Sequence Voltage
VA VB VC V1
MAG (kV) 134.14 131.64 128.60 131.45
ANG (DEG) 129.57 10.57 -111.89 129.47
Phase Currents Pos. Sequence Current
IAW1 IBW1 ICW1 I1W1
MAG (A) 365.26 359.22 379.91 367.91
ANG (DEG) 114.03 -2.46 -120.25 117.03
IAW2 IBW2 ICW2 I1W2
MAG (A) 617.05 587.00 599.40 600.93
ANG (DEG) 136.34 13.93 -106.93 134.65
FREQ (Hz) 60.00
Rate-of-change of FREQ (Hz/s) 0.00
Digitals
SV24 SV23 SV22 SV21 SV20 SV19 SV18 SV17
0 0 0 1 0 0 1 0
SV32 SV31 SV30 SV29 SV28 SV27 SV26 SV25
0 1 0 0 0 1 0 0
Analogs
MV29 2.300 MV30 0.150 MV31 17.400 MV32 -9.230
=>
Figure H.4 Sample MET PM Command Response
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