Super capacitor grid-connected control system and method for tram emergency traction mode

Abstract

The invention discloses a supercapacitor grid-connected control system and method in an emergency traction mode of a tram. The control system includes: at least two supercapacitor modules, each supercapacitor module is connected to the tram DC bus through a contactor Each contactor is connected to the main control unit, and the main control unit realizes the grid-connected control of the supercapacitor module by controlling the action of each contactor according to the hard-wired instructions from the driver's cab, so that the corresponding supercapacitor modules are connected to the grid. into the DC bus of the tram. The invention realizes the grid-connected control of the super-capacitor by the hard-wire switch in the driver's cab. After the emergency traction mode is activated, the grid-connected operation of the super-capacitor module can be completed independently, safely and reliably, so as to ensure the normal operation of the emergency traction mode of the tram. Even under extreme conditions such as TCMS system failure, the tram can successfully connect the supercapacitor module to the grid to provide power for emergency traction.

Description

Technical field [0001] The present invention relates to a tram emergency traction mode super capacitor grid-connected control system and method, belongs to the field of rail transit technology. Background [0002] In recent years, environmental protection issues such as environmental pollution, energy depletion and global warming have increasingly become the focus of attention of governments, so low-energy, zero-emission electric vehicles have become more and more important to the transportation industry and have become a hot spot in the development of urban transportation. [0003] Traditional trams need to set up catenarys along the track to provide electric energy supply for tram operation, that is, affecting the urban road landscape also increased the construction cost, with the further development of tram technology, there have been many people in China to use super capacitors as on-board energy storage devices for tram research. The power density of the supercapacitor is h...

AI Technical Summary

Problems solved by technology

In the actual operation process, simply connecting all supercapacitor modules in parallel with the DC bus of the vehicle through a contactor has the risk of low reliability. Once a module fails, all supercapacitors must be cut off. The supercapacitor modules are connected to the DC bus through their own independent contactors

Since different supercapacitor modules may have inconsistent power and different voltages, random grid connection may lead to a large current impact, resulting in heat generation and energy loss. In severe cases, it may even damage the supercapacitor and cause more serious consequences. Therefore, it is necessary to Control the grid-connected mode of the supercapacitor module

[0005] Usually, the supercapacitor grid-connected control of the tram is completed by the TCMS system, but in special cases such as when the TCMS fails, the vehicle needs to be pulled in an emergency in the non-catenary zone. Due to the particularity of the supercapacitor mentioned above, it is simply closed manually. It is very dangerous to connect the supercapacitor module contactor to the grid

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