Tram ground charging power supply system and charging control method

Abstract

The invention discloses a tramcar ground charging power supply system. The system comprises a rectification transformer, a rectifier, a ground charging station and a vehicle-mounted charging detection system, and further comprises an interlock control system. The ground charging power supply system is integrated in a power supply cabinet, and the power supply cabinet is internally divided into a high-voltage chamber, a transformer chamber and a low-voltage chamber. The high-voltage chamber is internally provided with an AC10kV AC switchgear and comprises a high-voltage inlet wire cabinet, a PT cabinet, a metering cabinet and outlet wire cabinet, the high-voltage inlet wire cabinet and a high-voltage power supply grid are connected. The transformer chamber is internally provided with a 10kV / 0.66kV rectification transformer, and the input end of the rectification transformer is connected with the output end of the outlet wire cabinet in the high-voltage chamber. The low-voltage chamber is internally provided with a rectification charging cabinet, a DC switchgear and a charging station control system. According to the invention, high-voltage AC power supply grid is directly connected by taking an AC10kV inlet wire cabinet rather than a conventional city track traffic traction network as power supply input, an integrated layout mode is employed, the AC switchgear, the transformer, a rectification unit and the like are integrated into one cabinet body, and the occupied space is small.

Description

technical field [0001] The invention belongs to the technical field of tram charging systems, and relates to a ground charging power supply system for trams and a charging control method. Background technique [0002] In recent years, with the progress and development of supercapacitor technology, more and more new trams at home and abroad use it as energy storage components to provide traction power for some or all non-catenary sections. In addition, supercapacitors can also Absorb the energy generated by electric braking of trams, so as to realize less-grid or even no-network, green and energy-saving trams. [0003] Supercapacitors are equipped on trams as energy storage components, and ground charging devices need to be arranged at the stations where passengers get on and off to quickly replenish electric energy for the supercapacitors of the vehicles, so as to ensure that the trams can run normally in the non-catenary section. [0004] The existing ground charging power...

AI Technical Summary

Problems solved by technology

This structure has the following defects: (1) Since the functional components are scattered in different cabinets, the entire ground charging power supply system is scattered and occupies a large space; Leading to excessive bus line loss

Considering the safety of the device, if the 1500V traction network voltage is used, the IGBT components with a withstand voltage of 3300V must be used, which will increase the production cost of the charging system due to high heat generation, low efficiency, large volume, and high lead wire loss.

The ground charging system needs a large current to achieve fast charging. If the existing 750V traction network is used for charging, the voltage is lower than the maximum voltage of the vehicle’s energy storage components, and a booster circuit needs to be added. This will not only greatly increase the complexity and volume of the system, but also will increase the cost of the system

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