ABB Relion 630 Series, Техническое руководство

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Table 306: Calculation for ENA_PPLS1
Inputs Signal
TEST PPLS1_TEST ENA _PPLS1
FALSE FALSE TRUE
FALSE TRUE FALSE
TRUE FALSE TRUE
TRUE TRUE TRUE
The
ENA_PPLS1
and
ENA_PPLS2
signals are provided to the Power monitoring
module, Adjacent area LS data handle module, Source1/source2 LS data handle
module and Load shed sharing mode module.
7.7.4.3 Adjacent area LS data handle
Based on the different conditions, this module processes the adjacent electrical
network areas load-shedding data.
The module considers the
PPLS1_DATA
input in following conditions.
• The Grid1 connectivity setting is set to “Peer substation”.
• The
PPLS1_QVAL
input is Good.
• The compensated CB status of power source1, that is,
CCB_CLS_SRC1
, is
TRUE.
• The enabling load-shedding status, that is,
ENA_PPLS1
, is TRUE.
If any one or more of the above conditions are not true, the module considers the
PPLS1_DATA
input as zero.
The must-shedding status (that is, bit 3 of
PPLS1_DATA
) remains unchanged, if all
of the following conditions are satisfied.
• The bit 1 of
PPLS1_DATA
, is TRUE.
• The bit 4 of
PPLS1_DATA
, is FALSE.
• The bit 30 of
PPLS1_DATA
, is FALSE.
• The bit 31 of
PPLS1_DATA
, is FALSE.
If any of the above conditions is not satisfied, the must-shedding status is FALSE.
The power balance status (that is, bit 2 of
PPLS1_DATA
) remains unchanged, if the
following conditions are satisfied.
1MRS757256 F
Section 7
Power management functions
PML630/Compact Load-Shedding Solution 265
Technical Manual