Schweitzer Engineering Laboratories SEL-421-4 - SEL Fast Message Synchrophasor Protocol

18.29
Date Code 20171006 Instruction Manual SEL-400 Series Relays
Synchrophasors
SEL Fast Message Synchrophasor Protocol
The line breaker status must be created with a protection SELOGIC variables.
Make the Protection Freeform logic settings in Table 18.16 in all six settings groups.
Make the Table 18.17 settings for Serial Port 3, using the SET P 3 command.
SEL Fast Message Synchrophasor Protocol
SEL Fast Message Unsolicited Write (synchrophasor) messages are general Fast
Messages (A546h) that transport measured synchrophasor information. The relay
can send unsolicited write messages as fast as every 50 ms on a 60 Hz system,
and 100 ms on a 50 Hz system. When MFRMT = FM, set PMLEGCY = Y to use
Global settings PHDATAV, PHDATAI, PHVOLT, and PHCURR to select the
voltage and current data to include in the Fast Message. Not all messages are sup-
ported at all data speeds. If the selected data rate is not sufficient for the given
message length, the relay responds with an error message.
Table 18.18 lists the Synchrophasor Fast Message Write function codes and the
actions the relay takes in response to each command.
Table 18.16 Example Synchrophasor Protection Freeform Logic Settings
Setting Value
PSV64 NOT (3PO OR SPO) # Line breaker status
Table 18.17 Example Synchrophasor Port Settings
Setting Description Value
PROTO Protocol (SEL, DNP, MBA, MBB, MBGA, MBGB, RTD, PMU) PMU
SPEED Data Speed (300 to 57600) 19200
STOPBIT Stop Bits (1, 2 bits) 1
RTSCTS Enable Hardware Handshaking (Y, N) N
FASTOP Enable Fast Operate Messages (Y, N) N
PMU MODE PMU Mode (CLIENTA, CLIENTB, SERVER) SERVER
PMODC PMU Output Data Configuration 1
Table 18.18 Fast Message Command Function Codes for Synchrophasor Fast
Write
Function
Code (Hex)
Function Relay Action
00h Fast message defini-
tion block request
Relay transmits Fast Message definition request
acknowledge (Function Code 80)
01h Enable unsolicited
transfer
Relay transmits Fast Message command acknowledged
message (Function Code 81). Relay transmits Synchro-
phasor Measured Quantities (function to enable: Unso-
licited Write broadcast, Function Code 20)
02h Disable unsolicited
transfer
Relay sends Fast Message command acknowledge mes-
sage (Function Code 82) and discontinues transferring
unsolicited synchrophasor messages (function to disable:
Unsolicited Write broadcast, Function Code 20)
05h Ping: determine if
channel is operable
Relay aborts unsolicited message in progress and trans-
mits ping acknowledge message (Function Code 85)