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Regenerative braking in DC systems |
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evaluated |
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Electric stock may recuperate energy during braking by using traction motors as generators. In DC supply systems (1,5 and 3 kV) high recovery rates are only achievable under favourable conditions.
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Technology field: Regenerative braking and energy management
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General information
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General criteria
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Environmental criteria
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Economic criteria
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Application outside railway sector (this technology is railway specific)
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Overall rating
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Overall potential: very promising |
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Time horizon: mid-term |
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Due to low catenary voltage and the fact that most substations do not allow for a feedback into the public grid, DC systems pose serious obstacles to recovery of brake energy. In very dense suburban networks, high recovery rates can be achieved without additional technologies. In all other cases, recovery rates are low but may be enhanced by innovative technological upgrades of vehicles and/or substations. However, this implies relatively high investment costs. In short term, DC operators should assess the optimisation potential on the basis of present technologies and in mid and long term consider the introduction of additional technologies. |
date created: 2002-10-09 |
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© UIC - International Union of Railways 2003 |
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