Long-Term Planning and Integration of Renewables at a...
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Long-Term Planning and Integration of
Renewables at a Mid-Sized Utility
LEE ALTERSR . SUPPLY S I DE PLANNER
TUCSON ELEC TRI C POWER
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Presentation Overview
• About TEP and its renewable energy goal
• System balancing requirements
• System balancing resources
• Other long-term renewable integration strategies• Energy storage
• Sub-hourly markets
• Sub-hourly analytic capabilities
• University/industry partnerships
• Corporate and public awareness
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About TEP
• Third largest utility in Ariaona, after APS and SRP
• Peak demand of 2,300 MW
• Vertically integrated
• 420,000 customers
• 1% annual growth
• State EE standard of 22% by 2020
• State RE standard of 15% by 2025
• Corporate RE goal of 30% by 2030
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Retail Sales
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2017 Integrated Resource Plan
Portfolio Energy Mix
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2017 2032
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TEP
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2017 Integrated Resource Plan
Timeline
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CAISO Typical Spring Day(I just couldn’t resist)
Average 10-min ramp = 1.6% of system peak(29% of 2016 retail sales served by renewables)
2016 Renewable Energy Mix
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TEP’s Duck Curve(Average of March 2024)
8Average 10-min ramp during HE 17 = 1.2% of system peak
(20% of 2024 retail sales served by renewables)
2024 Renewable Energy Mix
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Kingman
Red Horse Wind
Macho Springs
Rio RicoFt. Huachuca
Gato Montes Tech Park
Distributed Gen
Avalon IE.On Tech Park
Red Horse Solar
Avra Valley
Sites Used in Analysis:• 3 wind• 5 single-axis tracking• 3 fixed-tilt• 1 DG
Black Mountain
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Base Case
GeographicallyDispersed Case
GeographicallyConcentrated Case
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Allocation of Renewable Energy Capacity (2024)
2017 RE Capacity: 450 MW2024 RE Capacity: 920 MW
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TEP Ramping Requirements Under Alternative Siting Scenarios for Future Renewable Energyand Their Comparison to TEP Ramping Resources Under Optimal Conditions (2024)
200 MW / 10 min =7.7% of system peak
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Energy Storage:
Batteries
• In 2017, TEP commissioned two 10 MW x 2.5 MWh Li-ion batteries, primarily for frequency response and voltage support
• In 2019/2020, TEP will commission a solar-tied 30 MW x 120 MWh Li-ion battery
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Reciprocating Internal Combustion Engines
• TEP is procuringten 20 MW units
• Replacing twoold, gas-firedsteam units
• Improve reliability
• Integrate renewables
• Efficiently meet local min gen requirements
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2017 Hourly and Daily Gas Requirements
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2024 Hourly and Daily Gas Requirements
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Energy Storage:
Natural Gas Storage
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Energy Storage:
Pumped Hydro
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EIM / RTO Membership
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Enhanced Dispatch Cost Modeling:
Why and How
• To assess renewable integration strategies• Fast response generators, storage options, market
options, etc.
• Need to configure Aurora for sub-hourly modeling• Renewable energy generation, market prices, resource
parameters, etc.
• Need to improve post-processing capabilities
• Need a deep bench to do it right and to get buy-in
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Enhanced Dispatch Cost Modeling:
Preliminary Analysis at TEP
• Purpose• See how the model works at high time resolutions• Gauge the effort involved• Explore potential applications
• Case study• 1-hour vs 1-minute modeling of July 2024• 200 MW of RICEs versus 200 MW of batteries• Aurora version 12.3.1048• Commitment optimization• DemandNetMR for batteries• Renewable generation profile based on 1-minute actuals
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University of Arizona Tech Park
• 1300 acre campus
• 2M sqft of high-tech offices and laboratories
• Provides an interactive ground to connect university, community, and industry in the pursuit of technology innovation
• Commercializes invention stemming from university research
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University of Arizona Tech Park
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Tech Park Solar Zone
• One of the largest multi-tech solar demo sites in US
• Partnership between University of AZ and TEP
• Side-by-side testing of new technologies, plus:• Forecasting• Generation and distribution• Assembly and manufacturing• Product development• Testing and evaluation• Workforce training• Environmental impact evaluation• Public education and demonstration
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Tech Park Solar Zone
• Phase I• Recently completed
• Focused primarily on generation and distribution
• Each solar tenant has a 20-year PPA with TEP
• Phase II• In progress
• Focused on energy storage, grid optimization, micro grids, distributed systems, and integrated and embedded solar materials
• Includes plans for a solar education and visitor center
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Tech Park Solar Zone
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