H.8
SEL-700G Relay
Instruction Manual
Date Code 20170814
Synchrophasors
Settings for Synchrophasors
The choices for this setting depend on the synchrophasor system design.
➤
Setting NUMANA := 0 sends no user-definable analog values.
➤
Setting NUMANA := 1–4 sends the user-definable analog
values, as listed in Table H.3.
The format of the user-defined analog data is always floating point, and each
value occupies four bytes.
NUMDSW
Selects the number of user-definable digital status words to be included in the
synchrophasor data stream.
This setting is one of seven settings that determine the minimum port SPEED
necessary to support the synchrophasor data packet rate and size. See
Communications Bandwidth on page H.16 for detailed information.
The choices for this setting depend on the synchrophasor system design. The
inclusion of binary data can help indicate breaker status or other operational
data to the synchrophasor processor.
➤
Setting NUMDSW := 0 sends no user-definable binary status
words.
➤
Setting NUMDSW := 1 sends the user-definable binary status
words, as listed in Table H.4.
TREA1, TREA2, TREA3,
TREA4, and PMTRIG
Defines the programmable trigger bits as allowed by IEEE C37.118.
Each of the four Trigger Reason settings, TREA1–TREA4, and the PMU
Trigger setting, PMTRIG, are SEL
OGIC
control equations in the Global
settings class. The SEL-700G evaluates these equations and places the results
in Relay Word bits with the same names: TREA1–TREA4, and PMTRIG.
The trigger reason equations represent the Trigger Reason bits in the STAT
field of the data packet. After the trigger reason bits are set to convey a
message, the PMTRIG Equation should be asserted for a reasonable amount
of time, to allow the synchrophasor processor to read the TREA1–TREA4
fields.
Table H.3
User-Defined Analog Values Selected by the NUMANA Setting
NUMANA Setting
Analog Quantities Sent
Total Number of Bytes
Used for Analog Values
0
None
0
1
MV29
4
2
Previous, plus MV30
8
3
Previous, plus MV31
12
4
Previous, plus MV32
16
Table H.4
User-Defined Digital Status Words Selected by the NUMDSW
Setting
NUMDSW Setting
Digital Status Words Sent
Total Number of Bytes
Used for Digital Values
0
None
0
1
[SV32, SV31…SV17]
2
NOTE:
The PM Trigger function is
not associated with the SEL-700G
Event Report Trigger ER, a SEL
OGIC
control equation in the Report
settings class.
Summary of Contents for SEL-700G Series
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