Experiences of Renewables in System Operations 6th Annual Center for - PowerPoint PPT Presentation

Experiences of Renewables in System Operations 6th Annual Center for Water Resource & Economics Conference Skip Mize October 23, 2019

2 This Photo by Unknown Author is licensed under CC BY-SA

Current Status • Currently managing: Solar, Wind, and Biomass. • Solar: Utility Scale, Distributed, Military, BTM • Wind: Power Purchased Agreements • Growth to continue across the system…with the addition of batteries!! •Construction of a super-efficient, combined-cycle natural gas-fired generating unit at Plant Barry in Mobile County. Alabama Power would own and operate the proposed Barry Unit 8. •Acquisition of an existing combined-cycle natural-gas generating facility in Autauga County. • Construction of five solar facilities with paired energy-storage systems. Other companies would build and operate the facilities in Calhoun, Chambers, Dallas, Houston and Talladega counties while Alabama Power would receive all the energy and environmental attributes through long-term contracts. Alabama Power would also have the option to resell the energy and environmental attributes, either bundled or separately, to third parties, for the benefit of customers. •A long-term contract to purchase power from a combined-cycle natural-gas generating facility operating in Mobile County. • Approximately 200 megawatts of additional demand-side management and distributed energy resources. 3

California Today…And Our Future? • Large MWs of Solar and some wind • Lots of curtailments • Huge swings in generation to support this influx of solar generation • Low net loads 3500 3000 2500 Sum of Wind Curtailment Sum of Solar Curtailment 2000 1500 1000 500 0 11 5 8 11 2 5 8 11 2 5 8 11 2 5 8 11 2 5 8 11 2 5 8 11 2 5 8 11 2 5 8 11 2 5 8 11 2 5 9 8 9 10 11 12 13 14 15 16 17 18 19 4

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Operational Picture is Evolving Current situation is manageable Spring 100% • Limited impact from solar 95% 90% • The story is inside the hour: Volatility 85% • Mitigating with existing resources 80% • Adequate forecasting methodology 75% Winter • Working across company lines to address planning and 70% 100% operations 65% 95% 60% • Likely growth of resources makes this a key issue to address 90% 55% 85% now 50% 80% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 • Trying to learn from other utility experiences. 75% • Building on Visibility, Predictability, Dispatchability Summer 70% 100% 65% 95% 60% 90% 55% 85% 50% 80% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 75% 70% 65% 60% 55% 6 50% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

This Photo by Unknown Author is licensed under CC BY-NC-ND Actions to Minimize Operational Impacts • Integrate the Operational Fleet DER Requirements: Visibility, Predictability, Flexibility Strategy and Dispatchability • Broad organizational collaboration - VER Team VER Forecasting Team • Development Robust Planning Models and Operations Engagement • Enhancing forecasts models • Fleet Flexibility Strategy • Continually reviewing reserve needs • DER Strategy Development • Working with Research & Industry 7