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Global transcontinental power pools for low-carbon electricity
Haozhe Yang1, Ranjit Deshmukh1,2, Sangwon Suh3
1Bren School of Environmental Science and Management, University of California, Santa Barbara, CA, USA.
Nature Communications
|December 15, 2023
Summary
Transcontinental electricity trade is vital for a renewable energy future. It ensures reliable power supply and reduces costs, even with land constraints for renewable energy development.
Area of Science:
- Energy systems analysis
- Climate change mitigation
- Renewable energy integration
Background:
- Achieving global climate goals necessitates a transition to low-carbon electricity.
- Integrating high shares of variable renewable energy presents challenges in balancing electricity supply and demand due to resource distribution and variability.
Purpose of the Study:
- To investigate the role of transcontinental power pools in meeting future renewable electricity demand.
- To assess the impact of transcontinental electricity trade on system costs under varying land availability constraints.
Main Methods:
- Utilized an electricity planning model with hourly supply-demand projections.
- Incorporated high-resolution renewable resource maps for analysis.
- Examined six transcontinental power pools under different land constraint scenarios.
Main Results:
- Transcontinental electricity trade can reduce system costs by 5-52% by 2050 if all suitable renewable energy sites are available.
- Without trade, renewables may fail to meet 12% of global demand by 2050 under land constraints (top 10% sites).
- With transcontinental trade and land constraints, 100% renewable electricity demand can be met, reducing costs by up to 23%.
Conclusions:
- Expanding regional transmission networks is crucial for highly decarbonized, land-constrained electricity systems.
- Transcontinental power pools significantly enhance the reliability and cost-effectiveness of renewable energy integration.
- International electricity trade is a key enabler for achieving 100% renewable energy systems.
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