Signals - ABB RELION 630 Series Technical Manual

1MRS757256 F
7.10.5
PML630/Compact Load-Shedding Solution
Technical Manual
Table 343: Load-shedding information of the subnetwork calculated by the General logic module
Output
LS_OPERATE
NEG_POW_BAL
DIF_MUST_ACT
SLS_TRG_INH

Signals

Table 344: SNWRCLS Input signals
Name Type
SNW GROUP
SIGNAL
Table 345: SNWRCLS Output signals
Name Type
DISABLE_LS BOOLEAN
SN_ACTIVE BOOLEAN
LS_BLOCK BOOLEAN
SLS_TRG_INH BOOLEAN
NEG_POW_BAL BOOLEAN
LS_RESET BOOLEAN
MAN_LS_TRG BOOLEAN
LS_OPERATE BOOLEAN
LS_OPR_STS INTEGER
AVA_POWER REAL
RUNNING_LOAD REAL
SHDABL_LOAD REAL
POWER_BAL REAL
EFF_POW_BAL REAL
LOD_MISMATCH REAL
SHD_PRIO_RC1 INTEGER
SHD_PRIO_RC2 INTEGER
SHD_PRIO_RC3 INTEGER
MUST_SHD_LOD REAL
ACT_SHD_LOD REAL
Table continues on next page
Power management functions
Load-shedding information
If LS_OPR_STS output is Fast Load shed, Slow Load shed,
Manual Load shed or Extended Load shed, then the LS_OPERATE
output is TRUE, else the LS_OPERATE output is FALSE.
This output is calculated as TRUE if the EFF_POW_BAL value is
less than zero (that is, negative).
This output provides the difference in the must-shedding and the
actual loadshedding of the subnetwork, that is, DIF_MUST_ACT =
MUST_SHD_LOD - ACT_SHD_LOD.
If SLS_ENA_SNW signal is activated, SLS_TRG_INH is inactive
else SLS_TRG_INH is active.
Default Description
- Group signal for subnetwork
Description
Load shed disable
Subnetwork active status
Load shed block
Slow load shed trigger inhibit
Negative power balance status
Load shed reset
Manual load shed trigger
Load shed operate
Load shed operated status
Total Available power
Total load
Total sheddable load
Power balance in the subnetwork
Effective power balance in the subnetwork
Total load mismatch
Record-1 subnetwork shed priority
Record-2 subnetwork shed priority
Record-3 subnetwork shed priority
Must be load shed
Actually shed load
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