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

2020 & 2024 Draft LCR Study Results Stockton Area Ebrahim Rahimi Lead Regional Transmission Engineer Stakeholder Meeting March 14, 2019 ISO Public ISO Public

Stockton Area Transmission System & LCR Subareas Legend: Rio Oso Lockeford 230 kV 230 kV LCR Sub-Area 60 kV Vierra Lockeford Legend: 60 kV 115 kV Industrial 115 kV 60 kV Lockeford Lodi 230 kV Wodberg Victor 60 kV 60 kV 60 kV Tracy Lammers Manteca 115 kV Tesla Colony Kasson 115 kV 60 kV Bellota Schulte 230 kV G 115 kV GWF Tracy Legend: Bellota Units Weber 230 kV 230 kV LCR Sub-Area 60 kV Stockton A Weber Salado 60 kV Santa Fe 60 kV 60 kV Weber 115 kV 230 kV Ingram Creek Santa Fe Hazelton JCT 60 kV 115 kV 60 kV Tesla 230 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 Vierra Legend: 115 kV 115 kV Tracy X Limiting LCR (MW) Lammers Year Contingency Manteca Category (Deficiency) Facility X 115 kV Tesla Kasson 115 kV Schulte G 115 kV Schulte – Lammers GWF Tesla – Tracy Tracy 2020 B 115 kV and GWF 639 (65) Units 115 kV line Tracy #3 unit Schulte – Lammers Schulte- Salado 115 kV Kasson- and 2020 C 1,117 (543) Tesla – Tracy 115 kV Manteca 115 Ingram Creek 115 kV kV lines lines Tesla-Bellota LCR Sub-Area in 2024 Tesla – Tracy 115 kV Tesla – Vierra Legend: 2024 B and GWF Tracy #3 364 115 kV line Vierra 115 kV Thermal unit 115 kV Energy X Schulte – Lammers Tracy Tesla – Tracy and 2024 C (1) 756 (135) Lammers Tesla – Vierra 115 kV Manteca 115 kV line X 115 kV Tesla lines Kasson 115 kV Schulte G 115 kV Schulte – Lammers GWF Tesla – Vierra and Tracy 2024 C (2) 552 (260) Units 115 kV line Schulte-Kasson- Manteca 115 kV lines Salado 115 kV 2024 C (total) 881 (260) Ingram Creek 115 kV 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 Tesla - Bellota 761 673 (291) 848 1,117 (543) Total 1,174 777 (350) 1,275 1,241 (616) 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 Tesla - Bellota 809 319 (78) 899 881 (260) Total 1,174 439 (157) 1,275 1,009 (338) 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 Category B (Single) 598 89 687 Category C (Multiple) 625 616 1,240 Existing Generation 2024 LCR Need Capacity Needed (MW) Deficiency (MW) Total MW Need Category B (Single) 388 29 417 Category C (Multiple) 671 338 1,009 Slide 16 ISO Public