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18.21
Date Code 20171006
Instruction Manual
SEL-400 Series Relays
Synchrophasors
View Synchrophasors by Using the MET PM Command
View Synchrophasors by Using the MET PM Command
The
MET PM
serial port ASCII command may be used to view the PMU syn-
chrophasor measurements. See
for general information on
the
MET
command.
The
MET PM
command can be used as follows.
➤
As a test tool, to verify connections, phase rotation, and scaling.
➤
As an analytical tool, to capture synchrophasor data at an exact time,
to compare it with similar data captured in other phasor measurement
unit(s) at the same time.
➤
As a method of periodically gathering synchrophasor data through a
communications processor.
shows a sample
MET PM
command response. The synchrophasor
data are also available via the
HMI > Synchrophasor Metering
menu in Quick-
Set, and has a similar format to
.
The
MET PM
command can work even when no serial or Ethernet ports are con-
figured for sending synchrophasor data.
The
MET PM
command will only operate when the relay is in the HIRIG time-
keeping mode, as indicated by Relay Word bit TSOK = logical 1.
RTCDFB
Remote frequency rate-of-change for Channel B.
Hz/s
Vk
m
PMMD,
Vk
m
PMAD,
Vk
m
PMRD,
Vk
m
PMID
a, b
Aligned phase k synchrophasor voltage (M-magnitude,
A-Angle, R-Real, I-Imaginary) Terminal
m.
kV Primary,
degrees,
kV Primary,
kV Primary
V1
m
PMMD,
V1
m
PMAD,
V1
m
PMRD,
V1
m
PMID
Aligned positive-sequence synchrophasor voltage
(M-magnitude, A-Angle, R-Real, I-Imaginary)
Terminal
m.
kV Primary,
degrees,
kV Primary,
kV Primary
Ik
n
PMMD,
Ik
n
PMAD,
Ik
n
PMRD,
Ik
n
PMID
Aligned phase
k
synchrophasor current (M-magnitude,
A-Angle, R-Real, I-Imaginary) Terminal
n.
A Primary,
degrees,
A Primary,
A Primary
I1
n
PMMD,
I1
n
PMAD,
I1
n
PMRD,
I1
n
PMID
Aligned positive-sequence synchrophasor current
(M-magnitude, A-Angle, R-Real, I-Imaginary)
Terminal
n.
A Primary,
degrees,
A Primary,
A Primary
SODPMD
Second-of-day for all aligned data.
Seconds
FOSPMD
Fraction-of-second for all aligned data.
Seconds
FREQPMD
Aligned local system frequency.
Hz
DFDTPMD
Aligned local rate-of-change of frequency.
Hz/s
a
k
= A, B, or C.
b
m
= voltage terminal.
c
n
= current terminal.
Table 18.12
Synchrophasor Aligned Analog Quantities for Real-Time Control
(Sheet 2 of 2)
Name
Description
Units
Содержание SEL-421-4
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