Application of the Braking Energy Recovery System for High-speed Railway in Substations
The AC traction power supply system of electrified railway is characterized by regeneration,wide distribution,high energy consumption,strong regularity and great fluctuation and it consumes a great amount of electric energy every year.In recent years,with the continuous progress of studies on Energy Internet in the field of power systems,the energy consumption of traction power supply system for high-speed railway has attracted extensive attention.At present,all the high-speed trains adopt the regenerative braking mode.The braking energy is fed back to the traction network through a single-phase four-quadrant converter,and a portion of the braking energy fed back to the traction network is used by adjacent trains.Most of the energy is returned to the superior power grid of the traction network in the form of reverse current and can't be utilized,resulting in energy waste.To effectively recover the great amount of regenerative braking power produced by EMUs running on electrified railways and simultaneously improve the power quality of the traction power supply system,a regenerative braking energy recovery system for high-speed railway has been designed.When the train brakes,the excessive regenerative braking energy is absorbed into the super capacitor,and when the train need traction,the electric energy stored in the super capacitor is fed back to the traction network to supply the train traction.
high-speed railwayregenerative brakingenergy recoverypower qualityenergy storage system
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