Railway signal UPS system based on fuel cell

Abstract

The invention relates to a railway signal UPS system based on a fuel cell. The system is arranged between mains supply input and alternating current output and comprises a main loop power supply unit,a bypass power supply unit and a standby power supply unit, the bypass power supply unit is connected with the main loop power supply unit in parallel, and the main loop power supply unit comprises an AC/DC rectifying device, a DC/AC inversion device and an inversion control switch which are connected in sequence; and the standby power supply unit comprises an auxiliary battery, a DC/DC converterand a fuel cell system. The output end of the auxiliary battery and the output end of the fuel cell system are connected with the input end of the DC/AC inversion device through the DC/DC converter.The system further comprises a UPS control unit, and the UPS control unit is connected with the main loop power supply unit, the bypass power supply unit and the standby power supply unit. Compared with the prior art, the metal hydride hydrogen storage and fuel cell technology is used, innovation of the railway signal system power supply technology is improved, and the system is more efficient, clean and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of uninterruptible power supply, in particular to a fuel cell-based railway signal UPS system. Background technique [0002] Railway signaling system UPS (Uninterruptible Power Supply), as one of the railway electrification equipment, is widely used in the electrical equipment rooms and relay stations of various railway stations, mainly to provide uninterrupted high-quality power supply services for interlocking agencies and dispatching command management information systems. When "power pollution" and power outages such as power surges, instantaneous high voltage, instantaneous low voltage, and frequency deviation occur in railway power supply, UPS can well improve and ensure the quality of power supply, and provide high-quality power supply for railway equipment. [0003] In order to ensure that the railway signal UPS system provides continuous power supply when the external mains power is cut off, there m...

AI Technical Summary

Problems solved by technology

The lead-acid battery pack is in a state of floating charge and saturation for a long time, which seriously affects the battery life

According to the operation data of the railway system, the failure rate of UPS batteries is much higher than that of other components, and the battery itself and its maintenance costs are relatively high

In addition, the existing UPS has problems such as difficult discharge control of lead-acid batteries and inability to self-check battery failures.

In the event of a mains power outage, the limitation of its sustainable power supply time is difficult to overcome, and it has also become a bottleneck for the application of lead-acid batteries

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