PSS Studies

Test 1c and 3 – Post-disturbance loading and voltage limits with SHEP

 CatB – Peak case violations observed ▪ Thermal overloads around KTBR275 and PMJY275

| | ELQ_2024 | ELQ_2024 | | | _Peak_Ca | _Peak_Ca |

▪ All violations observed without the SHEP; hence, not caused by SHEP

X--- MONITORED ELEMENT ----X | X---LABEL--X | tB_wo_LS | tB_with_ | -----------------------------|--------------|----------|----------| 97207 KTBR275 275.00 | SINGL1 1589 | 105.7% | 104.8% | 97208 PMJY275 275.00 1 | | 722MVA | 716MVA | -----------------------------|--------------|----------|----------| 97207 KTBR275 275.00 | SINGL1 1588 | 105.7% | 104.8% | 97208 PMJY275 275.00 2 | | 722MVA | 716MVA | -----------------------------|--------------|----------|----------| 97244 PCGP275 275.00 | SINGL1 1614 | 103.2% | 102.6% | 97245 PGRG275 275.00 1 | | 774MVA | 770MVA | -----------------------------|--------------|----------|----------| 97244 PCGP275 275.00 | SINGL1 1613 | 103.2% | 102.6% | 97245 PGRG275 275.00 2 | | 774MVA | 770MVA | -----------------------------|--------------|----------|----------|

CONTINGENCY LEGEND: X--LABEL---X EVENTS

SINGL1 1588 : OPEN LINE FROM BUS 97207 [KTBR275 275.00] TO BUS 97208 [PMJY275 275.00] CKT 1 SINGL1 1589 : OPEN LINE FROM BUS 97207 [KTBR275 275.00] TO BUS 97208 [PMJY275 275.00] CKT 2 SINGL1 1613 : OPEN LINE FROM BUS 97244 [PCGP275 275.00] TO BUS 97245 [PGRG275 275.00] CKT 1 SINGL1 1614 : OPEN LINE FROM BUS 97244 [PCGP275 275.00] TO BUS 97245 [PGRG275 275.00] CKT 2

▪ Voltage range violations

| | ELQ_2024 | ELQ_2024 | | | _Peak_Ca | _Peak_Ca |

| | ELQ_2024 | ELQ_2024 | | | _Peak_Ca | _Peak_Ca |

X--------- BUS ---------X | X---LABEL--X | tB_wo_LS | tB_with_ | --------------------------|--------------|----------|----------| 74212 UJLI275 275.00 | UNIT 74912 | 1.05113 | 1.05119 | --------------------------|--------------|----------|----------| 74213 NGRI275 275.00 | UNIT 74912 | 1.05173 | 1.05174 | --------------------------|--------------|----------|----------|

X--------- BUS ---------X | X---LABEL--X | tB_wo_LS | tB_with_ | --------------------------|--------------|----------|----------| 97102 BKRI132 132.00 | SINGL1 1386 | 0.94580 | 0.94823 | --------------------------|--------------|----------|----------| 97181 PSLG132 132.00 | SINGL1 1386 | 0.93995 | 0.94240 | --------------------------|--------------|----------|----------|

▪ Voltage step violations

| | ELQ_2024 | ELQ_2024 | | | _Peak_Ca | _Peak_Ca |

X--------- BUS ---------X | X---LABEL--X | tB_wo_LS | tB_with_ | --------------------------|--------------|----------|----------| 97102 BKRI132 132.00 | SINGL1 1386 | 0.94580 | 0.94823 | --------------------------|--------------|----------|----------| 97181 PSLG132 132.00 | SINGL1 1386 | 0.93995 | 0.94240 | --------------------------|--------------|----------|----------|

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