R.7.18
SEL-421 Relay Reference Manual Date Code 20111215
Synchrophasors
Settings for Synchrophasors
These bits may be used to send various messages at a low bandwidth via the
synchrophasor message stream. Digital Status Words may also be used to send
binary information directly, without the need to manage the coding of the
trigger reason messages in SEL
OGIC.
Use these Trigger Reason bits if your synchrophasor system design requires
these bits. The SEL-421 synchrophasor processing and protocol transmission
are not affected by the status of these bits.
MRTCDLY
Selects the acceptable delay for received synchrophasor messages.
When the SEL-421 is operating as a synchrophasor client (PMUMODE set to
CLIENTA or CLIENTB), it only accepts incoming messages that are not older
than allowed by this setting. When determining an appropriate value for this
setting, consider the channel delay, the transfer time at the selected baud rate,
plus add some margin for internal delays in both the remote and local relay.
RTCRATE
Rate at which to expect messages from the remote synchrophasor device.
When the SEL-421 is operating as a synchrophasor client (PMUMODE set to
CLIENTA or CLIENTB), the relay will only accept incoming messages at this
rate. Make sure the remote synchrophasor source(s) is configured to send
messages at this same rate.
PMUMODE
Selects whether the port is operating as a synchrophasor server (source of
data) or a client (consumer of data).
When the port is intended to be a source of synchrophasor data, set RTCRATE
to SERVER. The Global setting MFRMT determines the format of the
transmitted data.
When using the port to receive synchrophasor data from another device, set
RTCRATE to either CLIENTA or CLIENTB. Only two ports may be
configured as client ports and they must be uniquely configured for channel A
or channel B. When a port is configured to receive synchrophasor data, the
port will only receive data using the C37.118 format, regardless of the
MFRMT setting.
RTCID
Expected synchrophasor ID from remote relay.
When the SEL-421 is operating as a synchrophasor client (PMUMODE set to
CLIENTA or CLIENTB), it will only accept incoming messages that contain
this ID. Make sure this ID matches the ID configured in the remote relay.
NOTE: The maximum channel delay
is available in the COM RTC command.
To Next Page
Loading...
