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Project information

Adequacy of electric transmission through railway tunnels

P. Sánchez

March 2001 - November 2001

Funding entity Fundación de los Ferrocarriles Españoles


This project analyzes the feasibility of using very high voltage cables through railway tunnels. This project has been supported by GIF («Gestor de Infraestructuras Ferroviarias»). GIF is the Spanish public company in charge of high-speed railway investments. This project analyzes technical aspects that influence the viability of using very high voltage cables to transport electric energy through railway tunnels.

Electric cables manufacturing technology has evolved during last decade. Nowadays there are a number of different technologies available. This project analyzes the pro and cons of these technologies taking into account previous experiences of similar uses of these cables. This project considers specific aspects of using cables through traffic tunnel such as:
1. Analysis of different technologies on very high voltage cables
2. Local and international experiences
3. Cable Maintenance and Reliability
4. Time Horizons in use
5. Physical cable position in tunnels
6. Compatibility of aerial transmission system and cables
7. Analysis of cable length impact


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