R.7.12
SEL-421 Relay Reference Manual Date Code 20111215
Synchrophasors
Settings for Synchrophasors
Descriptions of Synchrophasor Settings
Definitions for some of the settings in Table 7.1 are as follows:
MFRMT
Selects the message format for synchrophasor data streaming on serial ports.
SEL recommends the use of MFRMT := C37.118 for any new PMU
applications because of increased setting flexibility and the expected
availability of software for synchrophasor processors. The SEL-421 still
includes the MFRMT := FM setting choice to maintain compatibility in any
systems presently using SEL Fast Message synchrophasors.
MRATE
Selects the message rate in messages per second for synchrophasor data
streaming on serial ports.
Choose the MRATE setting that suits the needs of your PMU application. This
setting is one of eight settings that determine the minimum port SPEED
necessary to support the synchrophasor data packet rate and size. See
Communications Bandwidth on page R.7.26 for detailed information.
PMAPP
Selects the type of digital filters used in the synchrophasor algorithm:
➤ The Narrow Bandwidth setting (N) represents filters with a
cutoff frequency approximately ¼ of MRATE. The response in
the frequency domain is narrower, and response in the time
domain is slower. This method results in synchrophasor data
that are free of aliasing signals and well suited for post-
disturbance analysis.
Table 7.4 SEL-421 Ethernet Port Settings for Synchrophasors
Setting Description Default
EPMIP Enable PMU Processing (Y,N) N
PMOTS1 PMU Output 1 Transport Scheme
(OFF, TCP, UDP_S, UDP_T, UDP_U)
OFF
PMOIPA1 PMU Output 1 Client IP
(Remote) Address (www.xxx.yyy.zzz)
OFF
PMOTCP1 PMU Output 1TCP/IP (Local)
Port Number (1–65534)
4712
PMOUDP1 PMU Output 1 UDP/IP Data
(Remote) Port Number (1–65534)
4713
PMOTS2 PMU Output 2 Transport Scheme
(OFF, TCP, UDP_S, UDP_T, UDP_U)
OFF
PMOIPA2 PMU Output 2 Client IP
(Remote) Address (www.xxx.yyy.zzz)
OFF
PMOTCP2 PMU Output 2 TCP/IP (Local)
Port Number (1–65534)
4722
PMOUDP2 PMU Output 2 UDP/IP Data
(Remote) Port Number (1–65534)
4713
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