Technology catalogue for electricity transmission

Together with Danish TSO Energinet, the Danish Energy Agency publish technology catalogues for energy technologies. The catalogues contain information on, among other things, technical specifications and economy for a range of energy technical plants. The catalogues are used in connection with model work and other analyses, and are constantly being updated to ensure the best available data is accessible.

In July 2025, the Danish Energy Agency has published an update of the technology catalogue for energy transport. Ea Energy Analyses has authored a new section in the catalogue on electricity transmission.

The following updates can, among others, be found in the chapter and data sheets.

• Updated figures and text for improved clarity on transmission assets
• Expanded coverage of HVDC (High-Voltage Direct Current) and HVAC (High-Voltage Alternating Current) systems and their technical components
• Qualitative descriptions of multiterminal configurations for advanced systems.

Many developments have significantly raised the costs associated with electricity transport systems which means data sheets for the future cost development are highly uncertain. Key drivers for the recent price surge include:

• After the COVID-19 pandemic, demand for transmission assets surged due to renewed activity in the energy field. This caused an imbalance between demand and supply. The supply chains became challenged and still are.
• Additional demand increase of transmission components took place because of the general trend of energy systems going from “fossil fueled” to “green”, a development that calls for new investments in the transmission network.
• Increased prices of raw materials.
• The war in Ukraine had global macroeconomic effect and also meant that important factories of transmission assets (e.g., transformers) in Ukraine were destroyed.