Sel 751A - PHDATAI and ICOMP; Table H.3 Synchrophasor Order in Data Stream (Voltages and Currents)

H.6
SEL-751A Relay Instruction Manual Date Code 20100129
Synchrophasors
Settings for Synchrophasors
six settings that determine the minimum port SPEED necessary to support the
synchrophasor data packet rate and size—see Communications Bandwidth on
page H.10 for detailed information.
➤ PHDATAV := V1 will transmit only positive-sequence
voltage, V
1
➤ PHDATAV := ALL will transmit V
1
, V
A
, V
B
, V
C
, and V
S
(if
available)
➤ PHDATAV := NA will not transmit any voltages
Table H.3 describes the order of synchrophasors inside the data packet.
The VCOMP setting allows correction for any steady-state voltage phase
errors (from the potential transformers or wiring characteristics). See
Synchrophasor Measurement on page H.2 for details on this setting.
PHDATAI and ICOMP
PHDATAI selects which current synchrophasors to include in the data packet.
Consider the burden on your synchrophasor processor and offline storage
requirements when deciding how much data to transmit. This setting is one of
the five settings that determine the minimum port SPEED necessary to support
the synchrophasor data packet rate and size—see Communications Bandwidth
on page H.10 for detailed information.
➤ PHDATAI := I1 will transmit only positive-sequence current, I
1
➤ PHDATAI := ALL will transmit I
1
, I
A
, I
B
, I
C
, and I
N
➤ PHDATAI := NA will not transmit any currents
Table H.3 describes the order of synchrophasors inside the data packet.
The ICOMP setting allows correction for any steady-state phase errors (from
the current transformers or wiring characteristics). See Synchrophasor
Measurement on page H.2 for details on these settings.
Table H.3 Synchrophasor Order in Data Stream (Voltages and Currents)
Synchrophasors
a
a
Synchrophasors are included in the order shown (i.e., voltages, if selected, will always precede
currents).
Included When Global Settings Are as Follows:Polar
Magnitude Angle
V
1
V
1
PHDATAV := V1 or ALL
V
A
V
A
V
B
V
B
PHDATAV := ALL
V
C
V
C
V
S
V
S
I
1
I
1
PHDATAI := I1 or ALL
I
A
I
A
I
B
I
B
PHDATAI := ALL
I
C
I
C
I
N
I
N