If
Enable LS SubNetw1
setting = "Yes", the load-shedding is enabled in the
subnetwork 1 and if
Enable LS SubNetw1
setting = "No", the load-shedding is
disabled in the subnetwork 1. Similarly,
Enable LS SubNetw2
,
Enable LS SubNetw3
and
Enable LS SubNetw4
settings are used to enable or disable load-shedding in the
subnetwork 2, subnetwork 3 and subnetwork 4 respectively.
The load-shed disable status of the subnetwork is provided by
DISABLE_LS
z
.
If
SN_ACTIVE
z
is inactive or
LS_BLOCK<z>
is active for the
subnetwork, no load-shed priority is calculated for the corresponding
subnetwork. However, it is possible to perform load-shedding action
by manual load-shedding operation even if load-shedding is blocked
for the subnetwork.
The logic explained below is identical for all the subnetworks.
Based on various triggers, this module calculates the load-shed power and effective
load-shed power as follows.
If (
FLS_TRG_SNW
Z
or
SLS_TRG_SNW
Z
is active) and (
EFF_POW_BAL
z
<0),
⃒
EFF_POW_BAL
z
⃒
is considered for load-shed power
LS_POWER
z
calculation.
If
MAN_SHD_SN<z>
input is active,
MAN_LS_POW
Z
is considered for required load-
shed power
LS_POWER
z
calculation. The acknowledgement of manual load-shed
trigger is provided by
MAN_LS_TRG
Z
signal.
If
EXTD_TRG_SNW
Z
is active,
RCV_MS_POW
z
is considered for load-shed power
LS_POWER
z
calculation.
shows the calculation of required load-shed power
LS_POWER
z
.
LS
POWER
EFF
POW
BAL
MAN
SHD
POW
RCV
MS
POW
z
z
z
z
_
|
_
_
|
_
_
_
_
=
+
+
GUID-A9EEC16A-A8BF-4696-A360-1900F44B1DB7 V1 EN
(Equation 16)
shows the calculation of effective load-shed power
MUST_SHD_LOD
z
by
considering
LS_POWER
z
and
OV_LOAD
z
.
MUST
SHD
LOD
MAX LS
POWER
OV
LOAD
z
z
z
_
_
(
_
,
_
)
=
GUID-7CCB37B1-1D50-4D60-A918-A17B92A8CF39 V1 EN
(Equation 17)
If no load-shed triggers are active,
LS_POWER
z
and
M
UST_SHD_LOD
z
are zero.
Section 7
1MRS757256 F
Power management functions
290
PML630/Compact Load-Shedding Solution
Technical Manual
Содержание Relion 630 Series
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