Synchrocheck; Tracking Frequency; Frequency Rate Of Change - GE G30 Instruction Manual

6.3 METERING
The harmonics are a percentage of the fundamental signal obtained as a ratio of harmonic amplitude to fundamental ampli-
tude multiplied by 100%. The total harmonic distortion (THD) is the ratio of the total harmonic content to the fundamental:
Voltage harmonics are calculated only for Wye connected phase VTs. Ensure the
VOLTAGE BANK F5
NOTE
PATH: ACTUAL VALUES
 SYNCHROCHECK 1

If a synchrocheck function setting is "Disabled", the corresponding actual values menu item is not displayed.
6
PATH: ACTUAL VALUES
 TRACKING FREQUENCY

The tracking frequency is displayed here. The frequency is tracked based on the selection of the reference source with the
FREQUENCY AND PHASE REFERENCE
Power System section of chapter 5 for additional details.
PATH: ACTUAL VALUES
 FREQUENCY RATE
 OF CHANGE
The metered frequency rate of change for the frequency rate of change elements is shown here.
6-20
2

( , ) --- -
F m h
=
real
N
k
2

( m h , ) --- -
F
=
imag
N
k
( m h , )
F F
=
ampl
THD
=

PHASE VT XX CONNECTION
 
METERING

SYNCHROCHECK

SYNCHROCHECK 1 DELTA
VOLT: 0.000 V
SYNCHROCHECK 1 DELTA
MESSAGE
PHASE:
SYNCHROCHECK 1 DELTA
MESSAGE
FREQ:
 
METERING

TRACKING FREQUENCY

TRACKING FREQUENCY:
60.00 Hz
setting in the
SETTINGS
 
METERING

FREQUENCY RATE OF CHANGE

FREQUENCY RATE OF
CHANGE 1: 0.00 Hz/s
FREQUENCY RATE OF
MESSAGE
CHANGE 2: 0.00 Hz/s
FREQUENCY RATE OF
MESSAGE
CHANGE 3: 0.00 Hz/s
FREQUENCY RATE OF
MESSAGE
CHANGE 4: 0.00 Hz/s
G30 Generator Protection System
( ( ) ⋅ ( h ω ⋅ ⋅ t k ( ) ) )
f m k cos
–
0
( ( ) ⋅ ( h ω ⋅ ⋅ t k ( ) ) )
f m k sin
–
0
2 2
( , ) ( , )
m h F m h
+
real imag
2 2 2
F F ... F
+ + +
2 3 25
setting is "Wye" to enable voltage harmonics metering.

SYNCHROCHECK 1(4)
0.0°
0.00 Hz

SYSTEM SETUP
6 ACTUAL VALUES

SYSTEM SETUP AC INPUTS
6.3.3 SYNCHROCHECK
6.3.4 TRACKING FREQUENCY
 menu. Refer to the
POWER SYSTEM
6.3.5 FREQUENCY RATE OF CHANGE
(EQ 6.3)
(EQ 6.4)

GE Multilin