Current and future work
Power changeover in multi-mode trains
Evidence-based review of traction power settings
Identifying good practice in switching trains from one energy source to another.
Multi-mode trains are increasingly used on routes that are not fully electrified. They may draw on any combination of diesel, overhead lines, third rail electrification, and battery for traction power. Different arrangements are in place to assist with changeovers between power sources, leading to inconsistencies across the sector. Some trains rely on the driver only, some have supervising safeguards, and some are fully automatic.
RSSB research will focus on optimising the power changeover (PCO) process for multi-mode trains. The aim is to identify good practice and solutions for PCO to inform the specification and deployment of cost-effective, safe, and reliable solutions. The project will evaluate current PCO methods, including automatic processes used by modern trains. It will also consider the impact on driver workload and the need for a streamlined approach across GB, especially where trains operate between areas with different methods.
V/TE SIC initiated and supported the scoping work in 2024, and it will continue to steer the project throughout its delivery in 2025.
Keep up to date with the research project in the RSSB Research Catalogue (T1356).
Contact Mark Hanham, Senior Research Analyst, RSSB, with any queries:
Mark.Hanham@rssb.co.uk
Could optimising and standardising power settings on electric trains unlock efficiencies?
Traction power settings on electric rolling stock operating on the 25 kV alternating current power network have changed over time. A mix of ages of rolling stock and electrical infrastructure means that different traction power settings are in use around the network.
Accommodating all of these variations does not make the best use of available traction power. V/TE SIC commissioned research from RSSB on the feasibility and potential benefits of reconfiguring traction power settings. Settings under consideration include maximum train current, voltage regulation curves, and power frequency harmonics.
The overall aim is to grow system capacity for electrified fleets and routes. Potential benefits from changing power settings include:
greater acceleration and improved journey times
increased capacity
reduced energy consumption.
Keep up to date with the research project in the RSSB Research Catalogue (T1331).
This research is drawing on data from contemporary electric fleets and is actively engaging stakeholders. Please get in touch if you would like to be involved. Contact Mark Hanham, Senior Research Analyst, RSSB:
