ABB RELION REX640 Technical Manual page 1409

1MRS759142 F
7.5.5.2 Monitoring
Monitoring module consists of Fuel fault detection, Excitation fault detection, Fuel
rack monitoring and Excitation current monitoring as shown in
Topology input from Topology input from Topology input from
GOV_MOD_ISOC GOV_MOD_ISOC GOV_MOD_ISOC
GOV_MOD_CDRP GOV_MOD_CDRP GOV_MOD_CDRP
GOV_MOD_BASE GOV_MOD_BASE GOV_MOD_BASE
ENG_LOD_UNLD ENG_LOD_UNLD ENG_LOD_UNLD
AVR_MODE_DRP AVR_MODE_DRP AVR_MODE_DRP
FUEL_RCK_POS FUEL_RCK_POS FUEL_RCK_POS
Figure 799: Submodules of Monitoring
Fueling fault detection
This module detects over/under fueling faults in the fuel system or engine governor,
which result in the generator producing excessive active power (over fueling
condition) or insufficient active power (under fueling condition).
Fueling faults are detected by two methods which are Correlation algorithm and
Voting algorithm. The module activates OV_FUEL_FLT output in case of over
fueling fault detection and UN_FUEL_FLT output in case of under fueling fault.
Fueling faults are reported to Control logic module.
REX640
Technical Manual
topology topology topology
determination determination determination
P1, P2 ... P8 P1, P2 ... P8 P1, P2 ... P8
GOV_MOD_DRP GOV_MOD_DRP GOV_MOD_DRP
CDRP_F_SET CDRP_F_SET CDRP_F_SET
BASE_P_SET BASE_P_SET BASE_P_SET
GEN_MOD_LOC GEN_MOD_LOC GEN_MOD_LOC
Q1, Q2 ... Q8 Q1, Q2 ... Q8 Q1, Q2 ... Q8
I3P I3P I3P
U3P U3P U3P
I_EXCITATION I_EXCITATION I_EXCITATION
Condition monitoring functions
OV_FUEL_FLT OV_FUEL_FLT OV_FUEL_FLT
Fueling Fueling Fueling
fault fault fault
detection detection detection
UN_FUEL_FLT UN_FUEL_FLT UN_FUEL_FLT
OV_EXCT_FLT OV_EXCT_FLT OV_EXCT_FLT
Excitation Excitation Excitation
fault fault fault
detection detection detection
UN_EXCT_FLT UN_EXCT_FLT UN_EXCT_FLT
Fuel rack Fuel rack Fuel rack
position position position FUEL_RCK_FLT FUEL_RCK_FLT FUEL_RCK_FLT
Monitoring Monitoring Monitoring
Excitation Excitation Excitation
current current current
monitoring monitoring monitoring
Figure 799
.
I_EXCT_FLT I_EXCT_FLT I_EXCT_FLT
1409