Operation Principle - ABB RELION REX640 Technical Manual

1MRS759142 C
9.6.5
REX640
Technical Manual
Improper analog channel configuration causes a validation error if the analog
channels are not completely configured or they do not match with certain settings. For
troubleshooting, check the contents of this chapter and also the preprocessing blocks
in this document. The configuration can be written to the protection relay once the
mismatch is corrected.

Operation principle

The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "on" and "off".
The operation of ASGCSYN can be described with a module diagram. All the
modules in the diagram are explained in the next sections.
U3P1
U3P2
CL_COMMAND
BYPASS
BLOCK
EXT_CHECK
GCB_TEST
GCB_CLOSE
GCB_OPEN
ISO_A_CLOSE
ISO_B_CLOSE
MODE_GOV
MODE_AVR
DROOP_GOV
DROOP_AVR
GOV_ALM_HI
GOV_ALM_LO
AVR_ALM_HI
AVR_ALM_LO
DIFF_U_ASC1
DIFF_F_ASC1
ASC1_GEN_DAT
GUID-8B679C1D-0B37-46C8-B3DC-2F08EBF06E3A V2 EN
Figure 750: Functional module diagram
ASGCSYN can operate either with the U_AB or U_A voltages. The selection of used
voltages is defined with the VT connection setting of the voltage measurement
parameters.
U_A_AB
U_B_BC
U_C_CA
Energizing
U_A_AB
check
Synchroni-
zation
check and
control
Voltage and
frequency
matching
Section 9
Control functions
LBDG
LBLG
DBLG
DBDG
SYNC_INPRO
SYNC_OK
MATCH_INPRO
MATCH_OK
CLOSE_CB
CL_FAIL_AL
CMD_FAIL_AL
RAISE_U
LOWER_U
RAISE_F
LOWER_F
GOV_DROOP
AVR_DROOP
MOD_CHG_GOV
MOD_CHG_AVR
GEN_ASC_DATA
1401