R.7.37
Date Code 20111215 Reference Manual SEL-421 Relay
Synchrophasors
Synchrophasor Protocols and SEL Fast Operate Commands
Synchrophasor Protocols and SEL Fast Operate
Commands
The SEL-421 can be configured to process SEL Fast Operate commands
received on serial ports that have Port setting PROTO := PMU, when the Port
setting FASTOP := Y.
This functionality can allow a host device to initiate control actions in the
PMU without the need for a separate communications interface.
If port setting FASTOP:= Y on a serial port set to PROTO := PMU, the
SEL-421 will provide Fast Operate support. The host device can request a Fast
Operate Configuration Block when the relay is in the nontransmitting mode,
and the relay will respond with the message, which includes codes that define
the circuit breaker and remote bit control points that are available via Fast
Operate commands.
The SEL-421 will process Fast Operate requests regardless of whether
synchrophasors are being transmitted, as long as serial port setting
FASTOP := Y. When FASTOP := N, the relay will ignore Fast Operate
commands. Use the FASTOP := N option to lockout any control actions from
that serial port if required by your company operating practices.
The SEL-421 does not acknowledge received Fast Operate commands,
however, it is easy to program one or more Relay Word bits in the digital
status word to observe the controlled function. For example, a Fast Operate
Circuit Breaker 1 close command could be confirmed by monitoring the
breaker status bit 52AA1 by assigning SEL
OGIC free-form protection logic
setting PMV64 := 52AA1.
SEL Fast Operate commands are discussed in SEL Fast Meter, Fast Operate,
and Fast SER Messages on page R.5.8. Note that only the Fast Operate
function is available on ports set to PROTO := PMU. The protocols SEL Fast
Meter and SEL Fast SER are unavailable on PROTO := PMU ports.
To Next Page
Loading...
