Decarbonization Pathways in Power Systems

Decarbonization pathways in power systems encompass the strategic transformation of electricity generation, transmission and utilisation to achieve substantial reductions in carbon dioxide emissions. Central to these pathways is the accelerated deployment of renewable energy technologies such as solar photovoltaics, onshore and offshore wind, complemented by energy storage, demand-side flexibility and expanded high-capacity transmission networks. Cost trajectories of renewables and storage have fallen sharply, enabling non-fossil sources to reach high penetration at competitive prices. Comprehensive power-system models integrate resource assessments, operational constraints and infrastructure expansion to identify least-cost strategies, while also accounting for ancillary benefits such as air-quality improvements and enhanced energy security. The global significance of these pathways is reflected in diverse regional strategies that balance land use, grid stability and economic impacts, offering practical road maps for policy makers and system planners to align energy systems with deep-decarbonization targets.

Research from Nature Portfolio

Recent studies have demonstrated that optimised deployment of large-scale photovoltaic and wind farms, coordinated with ultra-high-voltage transmission lines and energy storage, can elevate renewable generation to several petawatt-hours per year while reducing abatement costs by an order of magnitude. By modelling learning curves and demand-side flexibility, it has been shown that strategic investments can deliver both affordability and equity gains, particularly in underserved regions. Other work has uncovered integration barriers for offshore wind power at provincial levels, revealing the need for doubled capacity targets by 2030, enhanced transmission planning and greater reliance on long-duration storage and green hydrogen to unlock coastal wind resources by mid-century. Foundational analyses of cost trajectories confirm that continued declines in solar, wind and battery costs could enable a majority non-fossil electricity mix by 2030 at lower system cost than business-as-usual scenarios, highlighting the critical role of technology cost trends in setting decarbonization ambition.

Research from all publishers

A spatially resolved model of power-system planning has mapped land-use constraints, renewable resource quality and transmission requirements at subnational scales, indicating that achieving carbon neutrality demands terawatt-scale expansion of wind and solar with strategic siting within 100 km of major demand centres. Integrating public-health objectives into power-sector planning has quantified that more stringent decarbonization caps can yield significant reductions in air-pollution-related mortality, with the monetised value of climate and health benefits surpassing additional capital expenditures. Complementary assessments of wind and photovoltaic potential using geographical information systems methods reveal that theoretical capacities in several regions far exceed current installations, underscoring untapped resource margins. Collectively, these studies emphasise the interconnected nature of resource potential, health co-benefits and spatial planning in crafting viable decarbonization pathways.

Decarbonization Pathways in Power Systems publication trend

The graph below shows the total number of articles in decarbonization pathways in power systems across all publications each year (not limited to Nature Index journals).

Technical terms

Ultra-high-voltage transmission: Electricity lines operating at voltages above 800 kV to transport large power flows over long distances with reduced losses.

Levelized cost of electricity (LCOE): The average per-unit cost of building and operating a generating plant over its lifetime, accounting for capital, fuel and operating expenses.

Renewable intermittency: Variability in power output from sources such as wind and solar arising from changing weather conditions.

Power-load flexibility: The ability of demand-side resources or dispatchable assets to adjust consumption or output in response to system needs.

Carbon neutrality: A state in which net greenhouse gas emissions are zero, achieved by balancing emissions with removals or offsets.

References

1. Accelerating the energy transition towards photovoltaic and wind in China. Nature (2023).
2. Grid integration feasibility and investment planning of offshore wind power under carbon-neutral transition in China. Nature Communications (2023).
3. Rapid cost decrease of renewables and storage accelerates the decarbonization of China’s power system. Nature Communications (2020).
4. Spatially resolved land and grid model of carbon neutrality in China. Proceedings of the National Academy of Sciences of the United States of America (2024).
5. Accelerating China’s power sector decarbonization can save lives: integrating public health goals into power sector planning decisions. Environmental Research Letters (2023).
6. Assessment of wind and photovoltaic power potential in China. Carbon Neutrality (2022).