2020 & 2024 Final LCR Study Results Stockton Area Ebrahim - PowerPoint PPT Presentation

2020 & 2024 Final LCR Study Results Stockton Area Ebrahim Rahimi Lead Regional Transmission Engineer Stakeholder Call April 10, 2019 ISO Public ISO Public

Stockton Area Transmission System & LCR Subareas Legend: Legend: Rio Oso Bellota Lockeford Weber 230 kV 230 kV 230 kV 230 kV LCR Sub-Area LCR Sub-Area 60 kV 60 kV Lockeford 60 kV Stockton A Weber Industrial 60 kV Santa Fe 60 kV 60 kV 60 kV Lockeford Weber 230 kV Lodi 230 kV Wodberg Victor 60 kV 60 kV 60 kV Santa Fe Hazelton JCT 60 kV 60 kV Colony Tesla 60 kV Bellota 230 kV 230 kV Tesla-Bellota LCR Sub-Area in 2020 Vierra Legend: Bellota 230 kV 115 kV 115 kV Tracy Bellota 115 kV Lammers Manteca 115 kV Tesla Kasson 115 kV Schulte G 115 kV GWF Tracy Stanislaus Units Riverbank 115 kV Melones JCT 115 kV 115 kV Ripon Salado 115 kV 115 kV Ingram Creek Riverbank 115 kV Tulloch 115 kV 115 kV Slide 2 ISO Public

New major transmission projects Project Name Expected ISD Year 2020 Ripon 115 kV Line Apr-19 Stockton A – Weber #1 & #2 60 kV lines Reconductor May-19 Year 2024 Feb-23 Vierra 115 kV Looping Project Slide 3 ISO Public

Power plant changes Additions: • No new resource addition Retirements: • No new retirements Slide 4 ISO Public

Stockton Area Overall: Load and Resources Load (MW) 2024 Generation (MW) 2024 2020 2020 Gross Load 1,270 1,360 Market/ Net Seller/ Battery 497 543 AAEE -16 -52 Solar 1 1 Behind the meter DG 0 0 Wind 0 0 Net Load 1,254 1,308 Muni 137 137 Transmission Losses 22 21 QF 18 18 Future preferred resource Pumps 0 0 0 0 and energy storage Load + Losses + 1,275 1,329 Total Qualifying Capacity 653 699 Pumps Slide 5 ISO Public

Lockeford Sub Area : Requirements LCR (MW) Year Category Limiting Facility Contingency (Deficiency) Lockeford – Lodi #2 60 Lockeford-Industrial 60 kV 2020 B 48 (24) kV line and Loci CT Lockeford-Industrial and Lockeford – Lodi #3 60 Lockeford – Lodi #2 60 kV 2020 C 97 (73) kV lines Lockeford – Lodi #2 60 Lockeford-Industrial 60 kV 2024 B 53 (29) kV line and Loci CT Lockeford-Industrial and Lockeford – Lodi #3 60 Lockeford – Lodi #2 60 kV 2024 C 102 (78) kV lines Legend: Colony 60 kV New Hope Contingency X Overload Lodi Victor Lockeford-Lodi #1 X Lockeford-Lodi #2 Lockeford Lockeford-Industrial X Lockeford-Lodi #3 Industrial ISO Public Slide 6 Lodi Jct

Lockeford Subarea: Load Profiles ISO Public Slide 7

Weber Sub Area : Requirements Weber LCR Sub-Area Legend: Contingency X 230 kV Overload 60 kV LCR (MW) Year Category Limiting Facility Contingency (Deficiency) Stockton A 60 kV No 2020 B None None requirement Stockton A-Weber #1 and #2 2020 C Stockton A-Weber #3 26 60 kV lines Hazelton JCT Santa Fe 60 kV 60 kV No 2024 B None None X X requirement Weber 60 kV Stockton A-Weber #1 and #2 2024 C Stockton A-Weber #3 26 60 kV lines Bellota 230 kV ISO Public Slide 8

Weber Subarea: Load Profiles ISO Public Slide 9

Stanislaus Sub Area : Requirements LCR (MW) Year Category Limiting Facility Contingency (Deficiency) Manteca - Ripon 115 kV Bellota-Riverbank-Melones 115 2020 B 179 Line kV line and Stanislaus PH unit 2020 C Same as Category B Manteca - Ripon 115 kV Bellota-Riverbank-Melones 115 2024 B 185 Line kV line and Stanislaus PH unit 2024 C Same as Category B Bellota 115 kV Bellota – Riverbank Bellota – Riverbank – Melones SW STA Riverbank JCT SW STA - Menteca Stanislaus – Manteca #2 Manteca 115 kV Stanislaus – Melones SW STA - Manteca Riverbank Melones JCT 115 kV X 115 kV Ripon Stanislaus 115 kV 115 kV Legend: 115 kV Riverbank Tulloch Contingency X 115 kV 115 kV Overload ISO Public Slide 10

Stanislaus Subarea: Flow Profiles ISO Public Slide 11

Tesla - Bellota Sub Area : Requirements Tesla-Bellota LCR Sub-Area in 2020 Tesla-Bellota LCR Sub-Area in 2024 Vierra Legend: Legend: Bellota 230 kV Vierra 115 kV 115 kV 115 kV Thermal Bellota 230 kV 115 kV Energy X Tracy Bellota 115 kV Tracy X Bellota 115 kV Lammers Manteca Lammers X Manteca 115 kV Tesla X 115 kV Kasson Tesla 115 kV Schulte Kasson G 115 kV 115 kV Schulte G 115 kV GWF GWF Tracy Stanislaus Tracy Stanislaus Units 115 kV Riverbank Melones Units Riverbank 115 kV JCT Melones 115 kV JCT 115 kV 115 kV Ripon 115 kV Ripon Salado 115 kV Salado 115 kV 115 kV 115 kV Ingram Creek Ingram Creek Riverbank 115 kV Tulloch Riverbank 115 kV 115 kV Tulloch 115 kV 115 kV 115 kV LCR (MW) Year Limiting Facility Contingency Category (Deficiency) Tesla – Tracy Schulte – Lammers 115 kV and GWF 639 2020 B 115 kV line Tracy #3 unit (60 NQC/ 61 Peak) Schulte – Lammers and Schulte-Kasson- 1,117 2020 C Tesla – Tracy 115 kV lines Manteca 115 kV lines (538 NQC/ 539 Peak) Tesla – Vierra Tesla – Tracy 115 kV and GWF Tracy 2024 B 364 115 kV line #3 unit Tesla – Tracy 115 kV Schulte – Lammers and 756 2024 C (1) Tesla – Vierra 115 kV lines line (131 NQC/ 132 Peak) Tesla – Vierra 115 kV Schulte – Lammers and 552 2024 C (2) line Schulte-Kasson-Manteca 115 kV lines (256 NQC/ 257 Peak) 881 2024 C (total) N/A N/A (256 NQC/ 257 Peak) ISO Public Slide 12

Tesla-Bellota Subarea: Flow Profiles ISO Public Slide 13

Changes from 2019 to 2020 2019 2020 Subarea Load LCR Load LCR Lockeford 184 83 (59) 190 97 (73) Weber 229 21 238 26 Stanislaus N/A 152 N/A 179 1,117 Tesla - Bellota 761 673 (291) 848 (538 NQC/ 539 Peak) 1,241 Total 1,174 777 (350) 1,275 (612 NQC/ 613 Peak) LCR increases is mostly due to load increase. The load has a much higher effectiveness factor than the most effective resource. N/A=Flow-through area. No defined load pocket. Slide 14 ISO Public

Changes from 2023 to 2024 2023 2024 Subarea Load LCR Load LCR Lockeford 198 103 (79) 193 102 (78) Weber 219 21 238 26 Stanislaus N/A 147 N/A 185 881 Tesla - Bellota 809 319 (78) 899 (256 NQC/ 257 Peak) 1,009 Total 1,226 439 (157) 1,330 (334 NQC/ 335 Peak) LCR increases is mostly due to load increase. The load has a much higher effectiveness factor than the most effective resource. N/A=Flow-through area. No defined load pocket. Slide 15 ISO Public

Stockton Area Total LCR Need Existing Generation Capacity Needed (MW) Deficiency (MW) Total MW Need 2020 LCR Need (84 NQC/ Category B (Single) 603 687 85 Peak) (612 NQC/ Category C (Multiple) 629 1,241 613 Peak) Existing Generation 2024 LCR Need Capacity Needed (MW) Deficiency (MW) Total MW Need Category B (Single) 414 29 443 (334 NQC/ Category C (Multiple) 675 1,009 335 Peak) Slide 16 ISO Public