{"query_echo":{"q":"","filters":{"analysis_type":["stress testing"]},"warnings":[{"code":"facet_value_not_in_vocabulary","message":"Value 'stress testing' for facet 'analysis_type' is not in the controlled vocabulary."}]},"total":{"value":2,"relation":"eq"},"page":1,"page_size":20,"self":"https://climateinsightsdirectory.org/api/v1/search?analysis_type=stress+testing","stability":"beta","ai_marking":{"digital_source_type":{"uri":"http://cv.iptc.org/newscodes/digitalsourcetype/trainedAlgorithmicMedia","name":"Created using Generative AI"},"notice":"Summary and key insights are generated using artificial intelligence."},"results":[{"id":"eninnova-000188","url":"https://climateinsightsdirectory.org/document/eninnova-000188","title":"ACHIEVING AN EQUITABLE AND RELIABLE 85 PERCENT CLEAN ELECTRICITY SYSTEM BY 2030 IN CALIFORNIA","publisher":{"name":"Energy Innovation","organization":"energy-innovation"},"document_type":"report","language":"en","date_published":"2022-05-09","source_url":"https://energyinnovation.org/wp-content/uploads/Achieving-An-Equitable-And-Reliable-85-Percent-Clean-Electricity-System-By-2030-In-California-1.pdf","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"The report argues that California can reliably reach an 85 percent clean electricity target by 2030 through a diverse portfolio of resources, including offshore wind and geothermal, while retiring significant natural gas capacity. It emphasizes the need to prioritize the retirement of gas plants in disadvantaged communities (DACs) to improve environmental justice. The authors recommend leveraging demand-side resources as a risk mitigation strategy and expanding regional coordination through a West-wide Regional Transmission Organization (RTO) to enhance grid resilience and reduce costs. The report serves as a policy companion to a technical analysis that stress-tested these portfolios against extreme weather events.","ai_generated":true,"unit":"eninnova-000188#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Technical analysis demonstrates that California can reliably operate a power system reaching 85 percent clean electricity by 2030, which would align the state with U.S. federal ambitions for a carbon-free electricity system by 2035.","ai_generated":true,"unit":"eninnova-000188#insight-1","date_modified":"2026-10-23"},{"text":"Diversifying the clean energy portfolio with resources such as geothermal and offshore wind can lower the required deployment rates for utility-scale solar and onshore wind, reducing risks related to supply chains, siting, and permitting.","ai_generated":true,"unit":"eninnova-000188#insight-2","date_modified":"2026-10-23"},{"text":"California can maintain grid reliability while retiring approximately one-third of its remaining natural gas capacity (about 11.5 GW) by 2030, provided it continues to build out clean energy and storage.","ai_generated":true,"unit":"eninnova-000188#insight-3","date_modified":"2026-10-23"},{"text":"Prioritizing the retirement of natural gas plants in disadvantaged communities (DACs) is essential for environmental justice, as more than half of the state's gas plants are located in these areas and contribute to significant local air pollution.","ai_generated":true,"unit":"eninnova-000188#insight-4","date_modified":"2026-10-23"},{"text":"Demand-side resources, specifically 'Load Shift' capabilities, can serve as a critical hedge against potential delays or supply chain disruptions in the deployment of battery storage.","ai_generated":true,"unit":"eninnova-000188#insight-5","date_modified":"2026-10-23"},{"text":"Greater regional coordination, potentially through a West-wide Regional Transmission Organization (RTO), could significantly reduce costs for California ratepayers and improve the reliability of economic imports.","ai_generated":true,"unit":"eninnova-000188#insight-6","date_modified":"2026-10-23"},{"text":"The current 'RPS' (Renewable Portfolio Standard) mindset, which focuses on the lowest marginal cost of energy, may be insufficient for the final stages of decarbonization where system reliability and the retirement of specific fossil fuel assets become the primary challenges.","ai_generated":true,"unit":"eninnova-000188#insight-7","date_modified":"2026-10-23"}],"climate_tags":["renewable electricity","Renewable portfolio standard","offshore wind power","geothermal energy","battery energy storage system","demand response","environmental justice","Power system reliability","electrification"],"geography_discussed":["World","United States"],"frame_perspective":[],"analysis_type":["policy analysis","technical modeling","stress testing"]},{"id":"eninnova-000101","url":"https://climateinsightsdirectory.org/document/eninnova-000101","title":"RELIABLY REACHING CALIFORNIA’S CLEAN ELECTRICITY TARGETS","publisher":{"name":"Energy Innovation","organization":"energy-innovation"},"document_type":"report","language":"en","date_published":"2022-05","source_url":"https://energyinnovation.org/wp-content/uploads/GridLab_California-2030-Study-Technical-Report-5-9-22-Update1.pdf","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"The study finds that California can reliably meet an 85% clean electricity target by 2030 using portfolios primarily composed of wind, solar, and battery storage. Through 264 PLEXOS simulations, the authors tested three portfolios—Base Case, Diverse Clean Resources, and High Electrification—against stressors including gas and coal retirements, low hydro availability, and extreme weather. Results indicate the system remains robust even under simultaneous stressors, though it remains dependent on a strategic amount of in-state natural gas and economic imports. The report emphasizes that diversifying resources with offshore wind and geothermal reduces the need for solar and storage and improves grid stability by lowering instantaneous inverter-based generation. While demand flexibility can offset some storage needs, the study concludes that further nodal transmission and grid stability analyses are required for a complete reliability assessment.","ai_generated":true,"unit":"eninnova-000101#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"California can reliably achieve an 85% clean electricity standard and a 75% renewable portfolio standard (RPS) by 2030 across multiple resource pathways, primarily utilizing wind, solar, and battery storage.","ai_generated":true,"unit":"eninnova-000101#insight-1","date_modified":"2026-10-23"},{"text":"Integrating diverse clean resources, such as 4 GW of offshore wind and 2 GW of geothermal, reduces the required new utility-scale solar capacity from 27 GW to 15 GW in the base load case and from 40 GW to 30 GW in the high-electrification case.","ai_generated":true,"unit":"eninnova-000101#insight-2","date_modified":"2026-10-23"},{"text":"The power system remains reliable even if all 14.3 GW of remaining coal capacity across the Western Interconnect is replaced by a portfolio of wind, solar, and storage, although this increases reliance on in-state natural gas by approximately 10% annually.","ai_generated":true,"unit":"eninnova-000101#insight-3","date_modified":"2026-10-23"},{"text":"California can target the early retirement of natural gas units sensitive to environmental justice concerns—approximately 11.5 GW of capacity—and still serve load, as these losses are largely offset by economic imports.","ai_generated":true,"unit":"eninnova-000101#insight-4","date_modified":"2026-10-23"},{"text":"The system is robust against extreme weather, including multi-day low wind and solar events (defined as three consecutive days below 30% of daily load) and heatwaves similar to the August 2020 rolling outages.","ai_generated":true,"unit":"eninnova-000101#insight-5","date_modified":"2026-10-23"},{"text":"When tested against simultaneous stressors—including gas and coal retirements, import constraints, low hydro, and extreme weather—the system remains generally reliable, with only 5 days of capacity shortfalls out of 3,680 evaluated days.","ai_generated":true,"unit":"eninnova-000101#insight-6","date_modified":"2026-10-23"},{"text":"Battery energy storage is the primary enabler for reliability, reducing the evening net load ramp by an average of 42% (from 26.8 GW to 15.5 GW over three hours).","ai_generated":true,"unit":"eninnova-000101#insight-7","date_modified":"2026-10-23"},{"text":"Demand flexibility and load shifting can act as a hedge against uncertainty and a partial substitute for battery storage, particularly in winter as electrification increases reliability risks.","ai_generated":true,"unit":"eninnova-000101#insight-8","date_modified":"2026-10-23"},{"text":"Diverse clean resources reduce the number of hours where instantaneous inverter-based generation exceeds 75% by approximately 40% compared to the Base Case, potentially improving grid stability.","ai_generated":true,"unit":"eninnova-000101#insight-9","date_modified":"2026-10-23"},{"text":"Current planning processes rely too heavily on capacity expansion modeling with limited sample days; the authors advocate for an iterative approach combining probabilistic resource adequacy and specific stress testing.","ai_generated":true,"unit":"eninnova-000101#insight-10","date_modified":"2026-10-23"}],"climate_tags":["renewable energy","onshore wind farm","offshore wind power","geothermal energy","battery energy storage system","Resource adequacy","Demand flexibility","Grid balancing","renewable electricity","environmental justice"],"geography_discussed":["Western Interconnect","WECC"],"frame_perspective":[],"analysis_type":["production cost modeling","scenario analysis","stress testing"]}]}