Slide 1: 2027 Electric and Natural Gas IRPs Technical Advisory Committee Meeting No. 2 Agenda
2027 Electric and Natural Gas Integrated Resource Plans Technical Advisory Committee Meeting No. 2 Agenda Tuesday, October 21, 2025 Virtual Meeting – 1:00 pm to 4:00 pm Pacific Time Topic State Audience • 2026-2029 CEIP Update WA Electric • Policy Considerations (OBBB, Other Building Codes, Eliminat
Slide 2: Introductions 2027 Electric & Gas Integrated Resource Planning
Introductions 2027 Electric & Gas Integrated Resource Planning TAC 2 – October 21, 2025 John Lyons, Ph.D. – Senior Resource Policy Analyst
Slide 3: Agenda
Agenda • Introduction, John Lyons • 2026-2029 CEIP Update (WA Elec), Kelly Dengel • Policy Considerations (All), John Lyons • Electric Resource Options, Robert Hughes • Natural Gas Resource Options, Michael Brutocao • Portfolio and Market Scenarios & Sensitivities for 2027 IRP (All), James Gall & Mi
Slide 4: Meeting Guidelines
Meeting Guidelines • IRP team is in office Monday – Wednesday; also available by email, phone and Teams for questions and comments • Stakeholder feedback responses shared with TAC at meetings, in Teams and in Appendix • Working IRP data posted to Teams • All TAC meetings will be virtual on Teams • D
Slide 5: Virtual TAC Meeting Reminders
Virtual TAC Meeting Reminders • Please mute mics unless speaking or asking a question • Raise hand or use the chat box for questions or comments • Respect the pause • Please try not to speak over the presenter or a speaker • Please state your name before commenting for the note taker • This is a pub
Slide 6: Answers to Questions from TAC 1
Answers to Questions from TAC 1 • Timing of meetings – see following slides with the dates and times of future meetings • Working with Avista’s Energy Efficiency Advisory Group to prevent double bookings • Final presentations, recordings and meeting notes will be posted on the IRP page • Future TAC
Slide 7: TAC 3 and TAC 4 Schedule
TAC 3 – Thursday, November 20, 2025 (13:00 – 16:30 PST) Topic State Audience Future Climate Analysis All E&G, Dist. CCA/CPP Overview and Joining New Markets WA/OR E&G Carbon Sequestration All E&G CPP Compliance OR Gas Natural Gas-Fired Heat Pump Technology All Gas Washington Non-Pipe Analysis WA Gas
Slide 8: TAC 5 and TAC 6 Schedule
TAC 5 – Friday, February 20, 2026 (13:00 – 16:00 PST) Topic State Audience New Electric Resource Options WA/ID Electric Wholesale Price Forecast – Deterministic WA/ID Electric New Gas Resource Options All Gas Liquified Natural Gas Analysis All Gas Electrification Assumptions and Scenarios All Gas TA
Slide 9: TAC 7 and TAC 8 Schedule
TAC 7 – Wednesday, April 15, 2026 (13:00 – 16:00 PDT) Topic State Audience Energy Efficiency Savings Since 2025 IRP OR Gas Hybrid Heat Pump Program Update OR Gas Gas Avoided Cost All E&G Long-Run Load Forecast All E&G End-Use Load Forecast All E&G TAC 8 – Monday, April 20, 2026 (13:00 – 16:00 PDT) T
Slide 10: TAC 9 and TAC 10 Schedule
TAC 9 – Friday, May 15, 2026 (13:00 – 16:00 PDT) Topic State Audience IRP Generation Option Transmission Planning Studies WA/ID Transmission Distribution System Planning within the IRP WA/ID Dist. Transmission Project Example Evaluation WA/ID Transmission QCC Forecast WA/ID Electric Gas Distribution
Slide 11: TAC 11 Technical Modeling Workshop and TAC 12
TAC 11 Technical Modeling Workshop – Monday, June 15, 2026 (13:00 – 16:00 PDT) Topic State Audience PRiSM Model Tour All E&G Aurora Resource Adequacy Model Tour WA/ID Electric New Resource Cost Model All E&G TAC 12 Wednesday, July 15, 2026 (TDB) Topic State Audience Load & Resource Balance and Metho
Slide 12: TAC 13 and TAC 14 Schedule
TAC 13 – Monday, August 17, 2026 (13:00 – 16:00 PDT) Topic State Audience Preferred Resource Strategy Results All E&G Oregon Non-Pipe Alternatives OR Gas Aldyl-A Analysis and Targeted Voluntary Electrification OR Gas IRP/Progress Report Outlines All E&G Next Steps All E&G TAC 14 – Thursday, Septembe
Slide 13: Other Key Dates
Electric Transmission & Distribution 5-Year Plan – October 7, 2026 (10:00 – 12:00 PDT) Topic State Audience Electric Trans Transmission & WA/OR Electric Distribution 5-Year Plan Other Key Dates • Oct 15, 2026 – Draft Electric IRP Released to TAC • Nov TBD 2026 – Virtual Public Meeting • Noon-1pm • 6
Slide 14: Clean Energy Implementation Plan
2025 Clean Energy Implementation Plan TAC 2 – October 21, 2025 Kelly Dengel, Clean Energy Policy & Implementation Manager
Slide 15: 2025 Clean Energy Implementation Plan Timing
2025 Clean Energy Implementation Plan Timing 2026-2029 Implementation Period Planning & Alignment UTC Recessed Open 2027 Biennial with 2025 IRP/CEAP Meeting – February CEIP – October 1 2024 2025 2026 2027 CEIP Advisory Group – January to July Draft 2025 CEIP for Comment – August 1-31 Virtual Public
Slide 16: 2025 Clean Energy Implementation Plan
2025 Clean Energy Implementation Plan Public Participation Named Communities & Plan Customer Benefit Indicators Proposed Targets | Specific Actions | Additional Actions & Goals Renewable Energy Demand Company Initiatives Energy Efficiency Response 3
Slide 17: Public Participation
Public Participation Strategies ▪ Virtual public meetings ▪ CEIP webpage improvements ▪ Quarterly email newsletter ▪ Increase multi-language access ▪ Equity Advisory Group ▪ Educational videos ▪ Community events ▪ Targeted paid social media ▪ Biennial CEIP survey ▪ Community partnerships 4
Slide 18: Named Communities Identification
Named Communities Identification Highly Impacted Communities Vulnerable Populations ▪ All DOH sensitivities combined score ▪ DOH Socioeconomic & Sensitive populations at 9 or higher 9 or higher or Tribal census tracts ▪ Federal – Climate and Economic Justice 40 Map: & Climate Change | Energy | Healt
Slide 19: Vulnerable Populations Characteristics
Vulnerable Populations Characteristics WA DOH – Socioeconomic 2021, 2023 & 2024 & Sensitive Factors Equity Advisory Group Identified Characteristics ▪ No high school diploma ▪ American Indian and ▪ Neighboring communities ▪ Religious and spiritual ▪ People of color Alaska Native (on/off and states p
Slide 20: Customer Benefit Indicators
Customer Benefit Indicators ▪ Evaluate customer benefit of the clean energy transition ▪ Track the equitable distribution of energy benefits and reductions of burdens to Named Communities 7
Slide 21: Customer Benefit Indicators
Customer Benefit Indicators 6 Equity Areas | 13 CBIs | 60 Metrics Energy Energy Environmental Public Affordability Accessibility Health Resilience Security Affects Participation in Outreach & Energy Availability Generation Outdoor Air Employee Diversity Company Programs Communication Location Qualit
Slide 22: Proposed Renewable Energy Targets
Proposed Renewable Energy Targets 100.0% Proposed 2025 CEIP* 90.0% Approved 2021 CEIP 80.0% Percent of Washington 70.0% Retail Load 60.0% 50.0% 80.0% 76.5% 73.0% 40.0% 69.5% 66.0% 62.5% 30.0% 55.0% 47.5% 40.0% 20.0% 10.0% 0.0% 2022 2023 2024 2025 2026 2027 2028 2029 2030 *Based on preliminary target
Slide 23: Renewable Energy
Renewable Energy Interim Targets Specific Actions 2026 – 66.0% ▪ Retire sufficient RECs to comply with annual targets 2027 – 69.5% 2028 – 73.0% Additional Actions 2029 – 76.5% ▪ 2025 All Source RFP energy & capacity online by end of 2029 ▪ 75 – 375 MW of winter qualifying capacity ▪ 50 – 350 MW of s
Slide 24: Energy Efficiency
Energy Efficiency Interim Targets Specific Actions 2025 IRP Forecasted: ▪ Continue existing cost-effective 147,344 MWhs EE savings by 2029 measures/program 73,672 MWhs for 2026-2027* ▪ Pursue CPA identified cost-effective 73,672 MWhs for 2028-2029** measures/programs Additional Actions ▪ None *Based
Slide 25: Demand Response
Demand Response Interim Targets Specific Actions Cumulative 55 MW of DR savings ▪ Continue 30 MW industrial DR contract during a single peak hour by 2029 ▪ Pursue cost-effective solutions from the 2025 All Source RFP Additional Actions ▪ TOU Rates & PTR Pilots ▪ EV TOU Rate ▪ NEAA End-Use Load Flex
Slide 26: Company Initiatives
Company Initiatives Goals Actions Achieve five aspirational ▪ Actions per aspirational CBI metric CBI metrics by 2029 ▪ Named Communities Investment Fund Invest up to $5 million annually in Named Communities Additional Actions ▪ Transmission Expansion Projects ▪ Connected Communities ▪ American Indi
Slide 27: Named Communities Investment Fund
Named Communities Investment Fund 2021 CEIP 2025 CEIP ▪ $5M annually ▪ $5M annually ▪ $2M EE & $3M Community ▪ $2M EE & $3M Community ▪ Funding limits by investment type ▪ No funding limits by investment type ▪ Single year EE funds rollover ▪ Single year uncommitted funds EE & Community rollover $2M
Slide 28: 2025 Clean Energy Implementation Plan Timing
2025 Clean Energy Implementation Plan Timing 2026-2029 Implementation Period Planning & Alignment UTC Recessed Open 2027 Biennial with 2025 IRP/CEAP Meeting – February CEIP – October 1 2024 2025 2026 2027 CEIP Advisory Group – January to July Draft 2025 CEIP for Comment – August 1-31 Virtual Public
Slide 29: Q&A WUTC Comments
Q&A WUTC Comments Online: https://www.utc.wa.gov/consumers/submit-comment Email: comments@utc.wa.gov Avista’s CEIP: Docket UE-250746 16
Slide 30: Energy Policies in the 2027 IRPs
Energy Policies in the 2027 IRPs TAC 2 – October 21, 2025 John Lyons, Ph.D. – Senior Resource Policy Analyst
Slide 31: Ever Changing Energy Policies
Ever Changing Energy Policies • Tax Credits • Support of Wind/Solar vs. Gas/Coal • Electrification • State vs. Federal • Workforce Reductions & Grant Cancellations 2
Slide 32: Tax Credits – IRA vs. OBBBA
Tax Credits – IRA vs. OBBBA • Investment Tax Credit (48E of IRC) • IRA: extended 30% until 2033 and eligibility to stand-alone storage, clean H2 and other technologies. Stackable bonuses on societal and sourcing factors. Added labor and component sourcing requirements. • OBBBA: early termination of
Slide 33: Tax Credits – IRA vs. OBBBA
Tax Credits – IRA vs. OBBBA • Production Tax Credit (45Y) • IRA extended existing PTC through 2033. Added clean H2 and other technologies for technology-neutral incentives. Stackable bonuses for societal and sourcing factors. • OBBBA cut wind and solar tax credits back to 2026-27. Wind and solar nee
Slide 34: Tax Credits – IRA vs. OBBBA
Tax Credits – IRA vs. OBBBA • Electric / Green Vehicles (25E, 30C & 30D) • IRA: Kept $7,500 tax credit per vehicle. Added credits for used and commercial EVs. Modified the qualification restrictions. • OBBBA: ends all EV tax credits after September 30, 2025, instead of the 2032 date in the IRA. Ends
Slide 35: Tax Credits – IRA vs. OBBBA
Tax Credits – IRA vs. OBBBA • Commercial Buildings (179D) • IRA: expanded eligibility to qualify for the existing credit/deduction. • OBBBA: ended credits for construction starting after June 2026. The OBBBA vs. the IRA: Crystalizing Energy Policy Changes | Competitive Energy Services 6
Slide 36: One Big Beautiful Bill Act (HB 1)
One Big Beautiful Bill Act (HB 1) • Signed into law July 4, 2025 • Biggest impact on energy is the changes to the clean energy incentives in the Inflation Reduction Act of 2022 (IRA) • Carbon capture and sequestration – changes 45Q tax credit for carbon dioxide used in enhanced oil recovery to bring
Slide 37: One Big Beautiful Bill Act (HB 1)
One Big Beautiful Bill Act (HB 1) • Low-emissions hydrogen – reduces support of renewable hydrogen • Electric vehicles – reduces EV and battery tax credits • Nuclear – maintains project start date requirements for IRA tax credits, but restricts ties to specified foreign countries • Solar/Wind – cuts
Slide 38: Washington I-2066
Washington I-2066 • Aims to preserve access to natural gas and roll back restrictions of gas • Statewide Initiative passed in November 2024 with 52% of the vote • March 2025- Ruled unconstitutional for violating the single subject rule in King County Superior Court • September 2025- Washington Supre
Slide 39: Natural Gas and Washington Building Codes
Natural Gas and Washington Building Codes Current Code Cycle • Commercial: SBCC added a retroactive compliance path for gas supplemental heat on select systems. Gas not viable for primary heat. • Residential: Gas allowed for backup heat but penalized in energy credits. Future Code Timeline • All 202
Slide 40: Natural Gas and Washington Building Codes
Natural Gas and Washington Building Codes Potential Gas-Related Challenges Ahead in 2024 Codes • Retrofits: No “like-for-like” gas system replacements in existing buildings. • Restaurants: New builds must wire for all-electric. Requirement for Energy Star appliances. Gas appliances not ENERGY STAR c
Slide 41: Oregon Policies
Oregon Policies • Electrification policies • Local natural gas bans or restrictions – Ashland tax • No specific state-wide building code prohibitions concerning natural gas • Climate Protection Program 12
Slide 42: Assumptions for the 2027 IRPs
Assumptions for the 2027 IRPs • ITC and PTC will not be renewed in the Base Case • Scenarios will consider extensions of the ITC and PTC • Base Case will assume no new credits for resources • Building Code assumptions for natural gas will be based on the current code – • Will not speculate on what c
Slide 43: Electric Resource Options
Electric Resource Options 2027 IRP Technical Advisory Committee Meeting No. 2 October 21, 2025 Robert Hughes – Resource Planning Analyst
Slide 44: Power Plant Size Considerations
Power Plant Size Considerations 2 OATI OASIS
Slide 45: Turbine Resources
A\e_ AIVISTA Turbine Resources
Slide 46: Turbine Buildout
WA House Bill 1589 Turbine Buildout OR House Bill 2021 4 *Map from Northwest Power and Conservation Council
Slide 47: Turbine Resource Options
Turbine Resource Options Resource Type Fuels Simple Cycle Combustion 7F.04/7F.05 CT Engine(CT) - Peaker Frame Natural Gas Biodiesel (B100) Reciprocating Internal Combustion Internal Engines (R.I.C.E) - Peaker Combustion Renewable Diesel Engines (RD100) Combined Cycle CT (CCCT) - (1x1 w/DF) Ammonia B
Slide 48: Wind Resources
A\e_ AIVISTA Wind Resources
Slide 49: Wind Buildout in the Region
Wind Buildout in the Region State Total Operating Capacity(MW) ID 1,145 MT 2,155 OR 3,801 WA 3,375 WY 4,083 Total 14,559 State Total Planned Capacity (MW) ID 1,564 MT 1,880 OR 931 WA 2,976 WY 7,520 Total 14,871 *Power plant and resource data from S&P Global* 7 .
Slide 50: Resource Options – Wind
Resource Options – Wind Resource Location Northwest Wind On System Northwest Wind Off System Montana Wind* Off System Offshore Wind Off System Palouse Wind Repower On System Rattlesnake Flat Wind Repower On System 8 *200 MW limit for MT resources without system upgrades. Capacity Factors being discu
Slide 51: Solar Resources
A\e_ AIVISTA Solar Resources
Slide 52: Solar Buildout in the Region
Solar Buildout in the Region State Total Operating Capacity (MW) ID 502 MT 181 OR 1,249 WA 268 WY 242 Total 2,443 State Total Planned Capacity (MW) ID 2,434 MT 1,405 OR 9,274 WA 4,357 WY 2,626 Total 20,096 10 *Power plant and resource data from S&P Global*
Slide 53: Resource Options – Solar
Resource Options – Solar Resource Size Residential 6 kW AC Commercial 1 MW AC Low Income Community Solar 500 kW AC Distribution Scale Array 3 MW AC Utility Scale Single Axis Tracking Array 100 MW Southern NW Single Axis Tracking Array 100 MW 11.Capacity Factors being discussed
Slide 54: Energy Storage Technologies
Energy Storage Technologies 12
Slide 55: Energy Storage Buildout in the Region
Energy Storage Buildout in the Region Total Operating Capacity State (MW) ID 398 MT 0 OR 522 WA 6 WY 0 Total 926 State Total Planned Capacity (MW) ID 1,550 MT 488 OR 10,651 WA 4,253 WY 775 Total 17,717 13 *Power plant and resource data from S&P Global*
Slide 56: Energy Storage Technologies
Energy Storage Technologies Resource Type Size Duration Distribution Level BESS 3 MW 4 hours Distribution Level BESS 3 MW 8 hours Transmission Level BESS 25+ MW 4 hours Transmission Level BESS 25+ MW 8 hours Long Duration Storage (Iron BESS 100 MW 100 hours Oxide) Hydro Pumped 100 MW 8 hours Hydro P
Slide 57: Additional Clean Energy Resources
Additional Clean Energy Resources 15
Slide 58: Additional Sources Buildout
Additional Sources Buildout *Power plant and resource data from S&P Global* 16 .
Slide 59: Additional Clean Energy Resource Options
Additional Clean Energy Resource Options Resource Type Location Size Conventional Geothermal Off System 20 MW Enhanced Geothermal Off System 20 MW Post Falls Upgrades Hydro On System 26 MW Long Lake 2 Hydro On System 20 MW Monroe Street 2 Hydro On System 15 MW Cabinet Gorge 5 Hydro On System 67.5 MW
Slide 60: Carbon Capture Utilization and Sequestration
Carbon Capture Utilization and Sequestration Carbon Capture Utilization and Sequestration (On System) • Commercial Carbon Capture • Industrial Carbon Capture • C.C.U.S. on current and potential future facilities – Coyote Springs 2 – Boulder Park – Rathdrum Units 1&2 – Lancaster – New CT and CCCT
Slide 61: Technologies being Researched
Technologies being Researched 19
Slide 62: Resource Options Currently Being Researched
Resource Options Currently Being Researched Molten Salt Heat Storage Advanced Geothermal Supercapacitors Others?
Slide 63: State of Interconnection Queue
State of Interconnection Queue Lawerence Berkeley National Laboratory Queued Up: 2024 Edition
Slide 64: State of Interconnection Queue
State of Interconnection Queue Lawerence Berkeley National Laboratory Queued Up: 2024 Edition
Slide 65: I.R.A. Tax Credits Impact
I.R.A. Tax Credits Impact Since passage over 1,200 GWs has been requested for interconnection. By Resource • 500+ GW Solar • 540+ GW Storage • 125 GW Wind Lawerence Berkeley National Laboratory Queued Up: 2024 Edition
Slide 66: Available Supply-Side Resource Options – Natural Gas
Available Supply-Side Resource Options – Natural Gas TAC 2 – October 21, 2025 Michael Brutocao, Natural Gas Planning Manager
Slide 67: Natural Gas Demand and Resource Options
Natural Gas Demand and Resource Options • Natural Gas Basin • AECO Reduced Demand & Fuel • Malin • Electrification • Natural Gas • Rockies • Energy • Alternative • Stanfield Efficiency Fuels • Station 2 • Demand • Sumas Response • Hydrogen • Blue • Green • Turquoise Compliance Storage & • RNG Mechan
Slide 68: Natural Gas Basins
Natural Gas Basins Station 2 AECO Sumas Stanfield Malin Rockies 3 Optional footer for data sources, etc.
Slide 69: Alternative Fuels – Hydrogen
Alternative Fuels – Hydrogen H2 H2 H2 Blue Green Turquoise Blue hydrogen is produced from Green hydrogen is Turquoise hydrogen is natural gas via Steam Methane produced via methane Reforming (SMR) or produced via the pyrolysis (Microwave Autothermal Reforming (ATR) electrolysis of water using Pyroly
Slide 70: Alternative Fuels – RNG
Alternative Fuels – RNG Animal Manure Food Waste Landfill Gas Wastewater Manure produced by Commercial, industrial The anaerobic Wastewater consists of waste liquids and solids livestock, including and institutional food digestion of organic from household, dairy cows, beef waste, including from was
Slide 71: Alternative Fuels – Synthetic Methane
Alternative Fuels – Synthetic Methane Biomass Industrial CO2 Capture Biomass gasification includes energy crops CO2 is captured from industrial sources and with high energy content, like agricultural combined with hydrogen to produce water and residues or forestry residues. The material pipeline qua
Slide 72: Storage
Storage Propane LNG Trucked CNG Propane is cooled into a Natural gas is cooled into a Natural gas is compressed liquid state and stored for liquid state known as under high pressure and later use. When needed, liquified natural gas (LNG) stored. The compressed the liquid is heated, and stored for la
Slide 73: Scenarios & Sensitivities
Scenarios & Sensitivities TAC 2 – October 21, 2025 James Gall, Manager of Resource Analysis Michael Brutocao, Natural Gas Planning Manager
Slide 74: Scenarios & Sensitivities – Electric & Natural Gas
Scenarios & Sensitivities – Electric & Natural Gas Scenarios Demand • No Climate Programs • High Electrification • Preferred Resource Strategy • Hybrid Heating • Zero CO2 by 2050 • Washington Building Codes • High Alternative Fuel & Renewable Costs Resources • High Natural Gas Prices Prices • No CO2
Slide 75: Scenarios & Sensitivities – Electric
Scenarios & Sensitivities – Electric Scenarios Demand • Data Center • High Economic Growth • Low Economic Growth Resources Prices • No Nuclear Power • Alternative Lowest Cost • No Power to Gas • No Linkage (CCA) 3 Scenarios & Sensitivities in green are new to the 2027 IRP.
Slide 76: Scenarios & Sensitivities – Natural Gas
Scenarios & Sensitivities – Natural Gas • High Growth Scenarios Demand • Low Natural Gas Use • Resiliency • Average Case Weather • Social Cost of Greenhouse Gas • No New Gas Customers After 2030 (WA, OR) Resources 4 Prices
Slide 77: Scenarios & Sensitivities
Scenarios & Sensitivities • (E & G) Preferred Resource Strategy: All expected case assumptions and costs; includes all known policies and orders from Idaho, Oregon, and Washington • (E & G) No Climate Programs: No climate policies (CETA, CCA, CPP) • (E & G) Zero CO2 by 2050: Customer needs met with
Slide 78: Scenarios & Sensitivities (Continued…)
Scenarios & Sensitivities (Continued…) • (E & G) No CO2 Sequestration: Carbon Capture and Sequestration technology is not available • (E & G) High Alternative Fuel & Renewable Costs: 95th percentile of Monte Carlo price draws • (E & G) High Natural Gas Prices: 95th percentile of Monte Carlo price dr
Slide 79: Scenarios & Sensitivities (Continued…)
Scenarios & Sensitivities (Continued…) • (Electric) Data Center: 250 MW load by 2032 • (Electric) High Economic Growth: Loads grow at higher annual average growth rate • (Electric) Low Economic Growth: Loads grow at lower annual average growth rate • (Electric) No Nuclear Power: No nuclear power pro
Slide 80: Scenarios & Sensitivities (Continued…)
Scenarios & Sensitivities (Continued…) • (Gas) Resiliency: Storage (Jackson Prairie) and pipeline transport capacities experience partial or zero availability for up to one week • (Gas) Social Cost of Greenhouse Gas: Cost of Social Cost of Greenhouse Gas added to CO2 emitting resources • (Gas) High
Slide 81: Questions and Comments
Questions and Comments • The earlier we receive inputs or requests for scenarios and sensitivities, the better the modeling will be • Deadline for inputs and requests is February 27, 2026 • Depending on what is required, we may be able to take some inputs and requests as late as July 2026 9
Slide 82: Modeling Methodology
Modeling Methodology TAC 2 – October 21, 2025 James Gall, Manager of Resource Analysis Michael Brutocao, Natural Gas Planning Manager
Slide 83: Best Practices in Integrated Resource Planning
Best Practices in Integrated Resource Planning • Lawrence Berkeley National Lab and Synapse Energy Economics • Typical IRP process diagram across industry • Avista’s process for the most part follows this process 2 Best Practices in Integrated Resource Planning: A guide for planners developing the e
Slide 84: Hourly Dispatch Model
Color Key Models Avista’s Process (Integrated Process) Internal Inputs External Inputs Aurora Aurora CROME Resource Options Outputs Resource Electric Gas Portfolio Cadmus Aurora Adequacy Portfolio Dispatch Model Dispatch Energy WRAP Efficiency Potential Portfolio Validation Hourly Dispatch Model Cap
Slide 85: Aurora
Aurora • Production Cost Model • Dispatch decision of resources to load subject to marginal cost to operate • Hourly time step (sub hourly capable) Western Interconnect Model Portfolio Model • Electric Market Price Forecast • Resource Adequacy • Resource Option Dispatch • CETA Analysis • Economic Va
Slide 86: What is CROME?
What is CROME? • Comprehensive Resource Optimization Model in Excel • Mixed Integer Program (MIP) • Optimizes nodal and zonal systems, selecting least-cost portfolio of resources to simultaneously solve for daily customer needs and periodic regulatory compliance The user interface The solver interfa
Slide 87: CROME Overview
CROME Overview • Objective • Considerations • Find least-cost mix of resources to serve • Existing gas portfolio (pipeline load between 2028 and 2050 transport costs, Jackson Prairie) • Capital and operating costs of • Constraints demand- and supply-side resources • Resources • Cost of compliance me
Slide 88: CROME Outputs
CROME Outputs • Resource Selection • Load-Reducing: energy efficiency (demand side management), demand response, electrification • Load-Serving: supply-side resources, storage optimization • Transportation & Storage: pipeline contract renewal, storage resources • Environmental Policy: compliance mec
Slide 89: What is PRiSM?
What is PRiSM? • Preferred Resource Strategy Model • Mixed Integer Program (MIP) used to select new resources to meet resource needs of our customers • Final model is available on Avista’s IRP website The user interface The solver interface The solver 8 Lindo.com, gurobi.com
Slide 90: PRiSM Overview
PRiSM Overview • Objective • Considerations • Find lowest cost mix of electric and gas • Existing generating resource and resources to meet load between 2028 gas transport portfolio and 2050 • Capital and operating costs of resources • Constraints • Interconnection costs • Resource limits • Can reso
Slide 91: PRiSM Outputs
PRiSM Outputs • Resource selection by year • Electric: energy efficiency, demand response, supply side generation/storage • Gas: energy efficiency, demand response, supply side fuel/storage • Transmission: Requirements for new generation • Pipeline Expansion: Generation or LDC requirements • Portfol