ABB RELION REX640 - Synchro check

Synchro
check
Close CB
condion
Synchroni-
zaon
control
Alarms
generaon
CL_COMMAND
BYPASS
EXT_CHECK
CB_TEST
CB_CLOSE
BLOCK
CB_OPEN
ISO_A1_CLOSE
ISO_A2_CLOSE
MATCH_OK
MATCH_INPRO
SYNC_OK
CLOSE_CB
CL_FAIL_AL
CMD_FAIL_AL
ENERG_STATE From
Energizing check
SYNC_INPRO
U3P1
U3P2
U_A_AB
U_B_BC
U_C_CA
U_A_AB
ASC1_NS_DAT
U_DIFF
FR_DIFF_MEAS
CB_SELECTED
AS_INIT_FAIL
NS_ASC_DAT
ISO_B1_CLOSE
ISO_B2_CLOSE
Figure 871: Module diagram for Synchronization check and control
Synchro check
The function measures the voltage difference U_DIFF_MEAS, frequency difference
FR_DIFF_MEAS and phase angle difference PH_DIFF_MEAS between the two bus
sides.
U DIFF MEAS U U Voltage offset
BusA BusB
_ _ = − +
(Equation 366)
U
BusA
Measured bus A side voltage
U
BusB
Measured bus B side voltage
Voltage off-
set
Setting Voltage offset
FR DIFF MEAS f f Frequency offset
BusA BusB
_ _ = − +
(Equation 367)
f
BusA
Measured bus A side frequency
f
BusB
Measured bus B side frequency
Frequency
offset
Setting Frequency offset
1MRS759142 F Control functions
REX640
Technical Manual
1591