ABB Relion 630 Series, Technical Manual

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Output Load-shedding information
LOD_INH_OPR This output provides the total operator inhibited (Manual
inhibition) of the sheddable load feeders in the subnetwork.
LOD_MISMATCH This output provides the load mismatch in the subnetwork.
MAN_SHD_POW This output provides the amount of load to be shed by the
operator in the subnetwork during manual load-shed action.
MAN_SHD_PRIO This output provides the load shed priority to be executed by the
operator in the subnetwork during manual load-shed action.
EFF_POW_BAL This output provides the effective load generation balance of the
subnetwork considering power balance of the subnetwork and
spinning reserve power received from adjacent electrical areas.
MUST_SHD_LOD This output provides the must be shed power of the subnetwork.
ACT_SHD_LOD This output provides the actual load-shed power of the
subnetwork.
LS_OPR_STS This output provides load shed operated status such as “No Load
shed”/“Fast Load shed”/“Slow Load shed”/“Manual Load shed”/
“Extended Load shed”
DISABLE_LS This output provides load-shed disable status in the subnetwork.
SN_ACTIVE This output provides the subnetwork active information.
LS_BLOCK This output provides the load-shed block information of the
subnetwork.
LS_RESET This output provides the load-shed reset information of the
subnetwork.
MAN_LS_TRG This output provides the manual load-shed trigger information.
SHD_PRIO_RC1 Latest load-shed priority
SHD_PRIO_RC2 Old load-shed priority
SHD_PRIO_RC3 Older load-shed priority
These outputs show the three load-shed priority generated in the
subnetwork. After load-shed reset action the shed priority resets
to zero.
For more information on the above mention inputs, see the LSCACLS
function.
7.10.4.1 General logic
The General logic module calculates the load-shedding information of the
subnetwork.
Section 7
1MRS757256 F
Power management functions
308 PML630/Compact Load-Shedding Solution
Technical Manual