Unlocking Energy System Efficiency: The Strategic Role of Hydrogen Infrastructure in Sector Coupling

Motivation

Europe benefits from well‑established planning processes for electricity and natural gas infrastructure, notably through the joint TYNDP scenarios developed by ENTSOG and ENTSO‑E, which provide a common reference for pan‑European infrastructure development and security of supply assessments. In contrast, coordinated planning frameworks for hydrogen infrastructure are still emerging as the hydrogen economy scales up and are therefore less mature in terms of cross‑border coordination, scenario consistency, and stress testing. To this end, Gas Infrastructure Europe (GIE) commissioned FfE, ConGas, and Consentec to conduct a comprehensive analysis of the strategic role of hydrogen infrastructure in sector coupling.

Objectives

Against this backdrop, the study focuses on implementation‑relevant questions rather than revisiting Europe’s level of climate ambition. It analyses how different degrees of sector coupling—particularly between electricity, natural gas, and hydrogen—affect system operation, robustness, and infrastructure needs in a future European energy system. Building on scenario inputs aligned with the joint TYNDP framework, the analysis combines high‑resolution energy system optimization with physically detailed network simulations for electricity, natural gas, and hydrogen.

Model Chain

To assess the importance of sector coupling in the future energy system, this study applies an integrated model chain that covers the entire energy system – from final energy demand to physically detailed flow calculations in hydrogen pipelines and electricity transmission grids. The unique feature of this approach is its ability to consistently represent both sectoral demand and the fluid-dynamic flows in gas infrastructure as well as the electrical load flows in transmission networks.

By explicitly integrating hydrogen into the sector‑coupled energy system and modeling infrastructure operation under future system conditions, the study complements existing European planning processes. It provides decision‑relevant insights into the practical feasibility of infrastructure development and highlights where sector coupling creates system value and where infrastructure constraints become critical for investment and implementation decisions.

Scenario Design

Scenarios describe internally consistent sets of assumptions for possible future developments of the energy system. They are not forecasts, but analytical tools designed to explore system behavior under clearly defined constraints and policy conditions. In this study, two scenarios are used to assess how different degrees of hydrogen availability and sector coupling affect the robustness, infrastructure needs, and feasibility of a climate‑neutral European energy system.

Key Messages

Taken together, the analysis translates Europe’s evolving policy framework into decision‑relevant system insights. The following nine key messages summarize the findings:

1. Climate neutrality in Europe by 2050 can be achieved in various ways – but aligning policy objectives, sectoral targets, infrastructure planning and investment security remains critical to close the gap between ambition and implementation.
2. Security of supply and climate neutrality require a technology mix in which sector coupling technologies will play a significant role – molecules and electricity are closely interlinked pillars of the future energy system.
3. The hydrogen system is a key flexibility and security of supply solution for the energy system – The European hydrogen transport infrastructure in conjunction with hydrogen storages is able to fulfill this role.
4. Hydrogen storage facilities are a time-critical element – their dimensioning and role are still underestimated in current policy plans.
5. Increased European hydrogen ambition can relieve the utilization of cross border net transfer capacities in the power system – however, the power grid is essential for economic hydrogen production.
6. Infrastructure costs, especially for hydrogen transport infrastructure, account for only a fraction of total energy system costs – yet the relatively modest investments required for the European hydrogen network play a crucial role in safeguarding Europe’s resilience.
7. Hydrogen transport infrastructure and storage must be designed for volatile hydrogen production and consumption – more flexible operation of the infrastructure than in the case of natural gas is technologically required to support the energy system.
8. A significant amount of hydrogen demand can be met cost-effectively within Europe – The combination of domestic production and imports strengthens the resilience of the energy system and increases security of supply.
9. Reliable planning requires integrated models and robust data with high temporal and spatial resolution – a coordinated European planning process is a prerequisite for this.