Synchrocheck - GE D30 Instruction Manual
Line distance protection system
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Also See for D30:
- Instruction manual (685 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (646 pages)
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CHAPTER 6: ACTUAL VALUES
This menu displays metered values for real, reactive, and apparent power, as well as power factor. The "SRC 1" text is
replaced by the name programmed by the user for the associated source (see
).
SOURCES
When VTs are configured in wye, the D30 calculates power in each phase and three-phase power is measured as
When VTs are configured in delta, the D30 does not calculate power in each phase and three-phase power is measured as
where
S is the apparent power
V
, V
, V
, I
, I
, I
are phase voltage and phase current phasors
A
B
C
A
B
C
V
and V
are phase-to-phase voltage phasors
AB
CB
Î is the conjugate of I
6.4.2.7 Frequency metering
ACTUAL VALUES METERING SOURCE SRC 1 FREQUENCY
FREQUENCY
SRC 1
The metered frequency values are displayed in this menu. The "SRC 1" text is replaced by the name programmed by the
user for the associated source (see
is measured via software-implemented zero-crossing detection of an AC signal. The signal is either a
SOURCE FREQUENCY
Clarke transformation of three-phase voltages or currents, auxiliary voltage, or ground current as per source configuration
(see the
SYSTEM SETUP POWER SYSTEM
frequency measurement is passed through a validation filter that eliminates false readings due to signal distortions and
transients.
6.4.3 Synchrocheck
ACTUAL VALUES METERING SYNCHROCHECK SYNCHROCHECK 1(4)
SYNCHROCHECK 1
D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
S = V
x Î
+ V
x Î
+ V
A
A
B
B
S = V
x Î
+ V
AB
A
CB
SRC 1 FREQUENCY:
0.00 Hz
SETTINGS SYSTEM SETUP SIGNAL SOURCES
settings). The signal used for frequency estimation is low-pass filtered. The final
SYNCHROCHECK 1 DELTA
VOLT: 0.000 kV
SYNCHROCHECK 1 DELTA
FREQ:
0.00 Hz
SYNCHROCHECK 1
DELTA PHASE:
0.0°
SYNCHROCHECK 1
SYNSCP D_PH: 0.0°
SYNCHROCHECK 1
V1 MAG: 0.000 kv
SYNCHROCHECK 1
V1 ANG: 0.0°
SYNCHROCHECK 1
V2 MAG: 0.000 kV
SYNCHROCHECK 1
V2 ANG: 0.0°
SYNCHROCHECK 1 PROJ
V2 MAG: 0.000 kV
SETTINGS SYSTEM SETUP SIGNAL
x Î
C
C
x Î
C
).
METERING
Eq. 6-1
Eq. 6-2
6
6-19
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