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Regenerative braking in 50 Hz, 25 kV systems |
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evaluated |
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| Electric stock may recuperate energy during braking by using traction motors as generators. 50 Hz, 25 kV supply systems offer medium conditions for feeding back recovered energy.
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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: short-term |
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50 Hz, 25 kV systems offer medium conditions for regenerative braking. Transmission of recovered energy over long distances is theoretically facilitated by high system voltage but phase differences limit energy transmission between one train and another to feeding sections. This is reflected in low to medium recovery rates in these supply systems. Nevertheless, there is potential to be exploited. Main barrier lies in drivers not using the electric brakes and in old stock not equipped with regenerative braking. Some future improvements could come from stock renewal and optimised concepts for blended braking. |
 date created: 2002-12-02 |
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| © UIC - International Union of Railways 2003 |
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