R.8.11
Date Code 20111215 Reference Manual SEL-421 Relay
IEC 61850 Communications
IEC 61850 Operation
➤ Every received and validated GOOSE message that indicates a
data change, by an incremented status number, is evaluated as
follows:
➢ Data within the received GOOSE dataset that are
mapped to host data bits are identified.
➢ Mapped bits are compared against a local version of the
available host data bits.
➢ If the state of the received bits is different than the local
version,
➣ Update the local version with the new state for
that bit.
➣ Pass the new state for the bit to the SEL-421.
➤ Reject all DA contained in an incoming GOOSE based on the
accumulation of the following error indications created by
inspection of the received GOOSE:
➢ Configuration Mismatch. The configuration number
of the incoming GOOSE changes.
➢ Needs Commissioning. This Boolean parameter of the
incoming GOOSE is true.
➢ Test Mode. This Boolean parameter of the incoming
GOOSE is true.
➢ Decode Error. The format of the incoming GOOSE is
not as configured.
➤ The SEL-421 will discard incoming GOOSE under the
following conditions:
➢ after a permanent (latching) self-test failure
➢ when the host is not responding
➢ when EGSE is set to No
Link-layer priority tagging and virtual LAN is supported as described in
Annex C of IEC 61850-8-1:2004(E).
GOOSE Performance
For outgoing high-speed data (CCOUTn data, as identified under GOOSE
Processing on page R.8.10), transmission of GOOSE begins within 2 ms of
transition of data within the SEL-421. For all other data contained in outgoing
GOOSE, transmission of GOOSE begins within 500 ms of transition of data
within the SEL-421. Appropriate control commands are issued to the
SEL-421 within 2 ms of a GOOSE reception.
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