Rail transit braking energy recovery system and hybrid power rail transit

Abstract

The invention relates to the technical field of energy saving of rail transit, in particular to a rail transit braking energy recovery system and hybrid power rail transit. The rail transit braking energy recovery system comprises a brake motor, a fuel battery, an electrolytic bath and a hydrogen tank, wherein the brake motor is used for converting the brake energy of the rail transit into electric energy; the output end of the brake motor is connected with a power input end of the electrolytic bath; and the electrolytic bath comprises a hydrogen output end and an oxygen output end, the hydrogen output end is connected with the hydrogen tank, and the hydrogen tank is connected with the fuel battery and used for providing hydrogen for the fuel battery. Based on the characteristic that a hybrid power rail transit vehicle is provided with the hydrogen tank, only the electrolytic bath is added structurally, the vehicle-mounted hydrogen tank already existing is directly used for storing hydrogen, the structure is simple, the self weight of a vehicle body is lowered, energy conversion efficiency is high, injection of hydrogen is avoided, and operation cost is lowered. Meanwhile, the purity of the hydrogen obtained through electrolysis is high, so that the hydrogen can be directly supplied to the fuel battery to be used without being processed.

Description

technical field [0001] The invention relates to the technical field of rail transit energy saving, in particular to a rail transit braking energy recycling system and a hybrid power rail transit. Background technique [0002] The existing traditional rail transit braking energy recovery technologies are mainly divided into three types: energy storage type (battery energy storage, flywheel energy storage and capacitor energy storage), inverter type (inverter feedback and inverter load) and resistance consumption type. Energy storage recovery devices are usually large in size. For hybrid rail transit, the system itself already has batteries or / and capacitors, which are relatively suitable for energy storage technologies other than flywheels. However, the additional DC / DC converters installed during the recycling process will greatly reduce the overall recycling efficiency. For pure fuel cell-driven rail transit, the additional installation of energy storage devices will incre...

AI Technical Summary

Problems solved by technology

The resistance consumption type has simple control, low price, and stable work, but all energy is consumed as heat energy, which not only forms thermal pollution, but also increases the power consumption of the air conditioning system. In essence, the braking energy has not been recycled, and the energy is used comprehensively. greatly reduced efficiency

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