Power Monitoring; General Logic - ABB RELION 630 Series Technical Manual

Section 7
Power management functions
7.7.4.5
Table 310: The calculation of available power and active power for power source 1
Setting Grid1 Output AVA_POWER_SRC1
connectivity
External source AVA_POW_SRC1 = AVA_POWER_SRC1
Peer substation 1.
2.
3.
7.7.4.6
268
connectivity setting, PEER2_DATA, PPLS2_QVAL and
ENA_PPLS2.
The module reports the calculated compensated circuit breaker statuses for power
source 1 and power source 2 to the Binary to integer module and Load shed sharing
mode module.
The module reports the calculated fast load-shedding triggers for power source 1 and
power source 2 to the General logic module.
The module reports the calculated island parallel status, fast load-shedding blocking
status for power source 1 and power source 2 to the Busbar logic.

Power monitoring

The module calculates the available powers and active powers for power source 1 and
power source 2.
Based on the Grid1 connectivity setting and various other conditions, available power
and active power for power source 1 are calculated as shown in
AVA_POW_SRC1 = ACT_POWER_SRC1, if
ACT_POWER_SRC1 ≥ 0
AVA_POW_SRC1 = 0.0, if PACT_POWER_SRC1 < 0
AVA_POW_SRC1 = AVA_POWER_SRC1, provided
any of the following is satisfied.
• LS_BLK_STS1 is activated
• ENA_PPLS1 is deactivated
• Input PPLS1_QVAL is Bad
• OC_OPR_SRC1 is activated
• MAX_DMD_SCR1 is activated
• EXT_SLT_SRC1 is activated
The logic is identical for calculating the ACT_POW_SRC2 and
AVA_POW_SRC2 outputs for power source 2.
The ACT_POW_SRC1, ACT_POW_SRC2, AVA_POW_SRC1 and AVA_POW_SRC2
outputs are reported for the monitoring view.

General logic

The module calculates the slow load-shedding trigger, slow load-shedding enable
status for each power source based on various conditions.
Table
Output ACT_POW_SRC1
ACT_POW_SRC1 = ACT_POWER_SRC1
1. ACT_POW_SRC1 = ACT_POWER_SRC1, if
ACT_POWER_SRC1 ≥ 0
2. ACT_POW_SRC1 = 0.0, if
ACT_POWER_SRC1 < 0
3. ACT_POW_SRC1 = ACT_POWER_SRC1,
provided any of the following is satisfied.
• LS_BLK_STS1 is activated
• ENA_PPLS1 is deactivated
• Input PPLS1_QVAL is Bad
PML630/Compact Load-Shedding Solution
1MRS757256 F
310.
Technical Manual