18.9
Date Code 20171006 Instruction Manual SEL-400 Series Relays
Synchrophasors
Settings for Synchrophasors
PHDV
q
Selects the type of voltages to be included in the synchrophasor data stream q.
This setting affects the synchrophasor data packet size.
➤ PHDVq := V1, sends only positive-sequence voltage synchrophasors
of selected terminals.
➤ PHDVq := PH, sends only phase voltage synchrophasors of selected
terminals.
➤ PHDVq := ALL, sends phase and positive-sequence voltage
synchrophasors of selected terminals.
PHDI
q
Selects the type of currents to be included in the synchrophasor data stream q.
This setting affects the synchrophasor data packet size.
➤ PHDIq := I1, sends only positive-sequence current synchrophasors of
selected terminals.
➤ PHDIq := PH, sends only phase current synchrophasors of selected
terminals.
➤ PHDIq := ALL, sends phase and positive-sequence current
synchrophasors of selected terminals.
PHNR
q
Selects the numeric representation, integer (I) or floating-point (F), of voltage
and current phasor data in the synchrophasor data stream q. This setting affects
the synchrophasor data packet size.
➤ PHNRq := I sends each voltage and/or current synchrophasor as 2
two-byte integer values. The PMU uses ((7 • I
NOM
• CT Ratio) /
32768) • 100000)) for the current phasor scaling factor and uses
((150 • PTR) / 32768) • 100000)) for the voltage phasor scaling
factor. I
NOM
is 1 A or 5 A.
➤ PHNRq := F sends each voltage and/or current synchrophasor as 2
four-byte floating-point values.
PHFMT
q
Selects the phasor representation of voltage and current phasor data in the syn-
chrophasor data stream q.
➤ PHFMTq := R (rectangular) sends each voltage and/or current
synchrophasor as a pair of signed real and imaginary values.
➤ PHFMTq := P (polar) sends each voltage and/or current
synchrophasor as a magnitude and angle pair. The angle is in radians
when PHNRq := F, and in radians • 10
4
when PHNRq := I. The range
is – < angle .
In both the rectangular and polar representations, the values are scaled in root
mean square (rms) units. For example, a synchrophasor with a magnitude of 1.0
at an angle of –30 degrees will have a real component of 0.866, and an imaginary
component of –0.500.
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