Schweitzer Engineering Laboratories SEL-421-4 - Simulation Mode

17.21
Date Code 20171006 Instruction Manual SEL-400 Series Relays
IEC 61850 Communication
Simulation Mode
messages #1 and #2 from the process bus and the station bus, and out-of-
sequence error is reported for GOOSE messages #1 and #2 subscriptions. Proper
management and segregation of GOOSE messages from the station bus and the
process resolves this. For example, if GOOSE message #1 is designed for the
process bus only, engineers can configure the station bus Ethernet switch to only
forward GOOSE message #2 and the process bus Ethernet switch to only forward
GOOSE message #1 via VLAN management.
SEL recommends using an SEL Software Defined Network (SDN) Ethernet
switch to engineer each Ethernet traffic flow. Engineers can plan the network
path for process bus GOOSE messages to flow through the process bus SDN
switch only and discard the station bus GOOSE messages.
Simulation Mode
NOTE: SV Simulation is only
applicable in IEDs with SV subscription
capability.
SEL-400 series relays (including the SEL-401) can be configured to operate in
simulation mode. In this mode, the SEL-400 series relays continue to process
normal SV or GOOSE messages until a simulated SV or GOOSE message is
received for a subscription. Once a simulated SV or GOOSE message is received,
only simulated SV or GOOSE messages are processed for that subscription. The
simulated mode only terminates when LPHDSIM is returned to FALSE. When
the relay is not in the simulation mode, only normal SV messages are processed
for all subscriptions.
A user can place the SEL-421 in SV simulation mode by setting LPHDSIM
(CFG.DevIDLPHD1.Sim.stVal) to true via MMS messaging.
Figure 17.8 Use Ethernet Switch to Engineer Network Path for GOOSE
Messages.
Process Bus
Station Bus
SV Relay
Merging Unit
Ethernet Switch
A B C D
A B C D GOOSE Message #2
SCADA
Ethernet Switch
GOOSE Message #1 and #2
GOOSE Message #1
GOOSE Message #1 and #2, SV