7.7.2
Function block
SOURCE1
SOURCE2
NPMMXU
SOURCE3
SOURCE4
SOURCE5
SOURCE6
SOURCE7
SOURCE8
SLS_TRG_INH
PPLS1_DATA
PPLS2_DATA
NW_SOURCE
NW_PPLS2
NW_PPLS1
PPLS1_QVAL
PPLS2_QVAL
PPLS1_TEST
PPLS2_TEST
TEST_REQUEST
CONFIG_ERROR
TEST
GUID-2D1D2979-78F9-49AE-9816-C962CFADE9E3 V1 EN
Figure 145:
Function block
7.7.3
Functionality
The network power monitoring function NPMMXU controls the load-shedding
action by processing the load-shed data of various power sources received from the
corresponding instances of PSCSWI functions. This function also controls the load-
shedding action for configuration B by processing the load-shedding data received
from the adjacent electrical areas, calculating the spinning reserve sharing mode and
must-shedding sharing mode. This function calculates the island-parallel status, fast
load-shedding block, slow load-shed trigger, slow load-shedding inhibition and
overload amount for busbar 1... busbar 4.
This function configures the available power and active power for power sources
connected to the adjacent electrical areas. The load-shedding data of power sources
and adjacent electrical areas are reported to LSCACLS for load-shedding action.
7.7.4
Operation principle
The operation of NPMMXU can be described by using a module diagram. All the
modules in the diagram are explained in the next sections.
Section 7
1MRS757256 F
Power management functions
262
PML630/Compact Load-Shedding Solution
Technical Manual
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