Adjacent Area Ls Data Handle - ABB RELION 630 Series Technical Manual

1MRS757256 F
7.7.4.3
PML630/Compact Load-Shedding Solution
Technical Manual
Table 306: Calculation for ENA_PPLS1
TEST
FALSE
FALSE
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.

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.
Power management functions
Inputs
PPLS1_TEST
FALSE
TRUE
FALSE
TRUE
Section 7
Signal
ENA _PPLS1
TRUE
FALSE
TRUE
TRUE
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