Networked traction power supply system based on integration of three networks

Abstract

The invention discloses a networked traction power supply system based on integration of three networks. The networked traction power supply system comprises a traction substation in wired communication with an optical fiber network and a train capable of being in wireless communication with the traction substation. After the optical fiber network processes the received data, internal parts of the traction substations are controlled, the traction substations share load data of the traction substations through the optical fiber network, and the traction substations communicate with trains located on power supply arms on the two sides of the traction substations through a wireless network; an incoming line of a power system in the traction power supply system is connected to the primary side of a substation in the same phase sequence, and the output end of a transformer and the output end of a power flow controller are connected with the direct secondary side output of a traction transformer through a traction network to jointly supply power to the traction network. The system has the advantages that through power supply is achieved through the power flow controller, power supply islands are eliminated, equalizing current and an electromagnetic looped network are not generated, and the power supply capacity and the regenerative braking energy utilization rate are improved. The energy storage device realizes new energy interconnection and improves the environment-friendly level of power utilization of the power supply system.

Description

technical field [0001] The invention relates to a traction power supply system, in particular to a traction power supply system based on the deep integration of electric network, energy network and information network. Background technique [0002] The main-line railway traction power supply system in my country adopts a single-phase AC power frequency (50Hz) traction network with a rated voltage of 25kV, and uses overhead catenary power supply to supply power to trains. There is a difference in the number of phases between the traction power supply system and the three-phase public grid. In order to ensure the three-phase balance of the grid, the electrified railway adopts the phase sequence rotation method to connect to the public grid. Electric phase separation is set at the exit of the power station, forming an isolated island of power supply and information. At present, the problems in the traction power supply system are mainly manifested in the following aspects: ...

AI Technical Summary

Problems solved by technology

The regenerative braking energy generated when the train is running can only be absorbed in the power supply arm, which is difficult to fully utilize, and the traction power cannot be transferred between different power supply arms and support each other. The degree of interconnection is low, and the power cannot be integrated. In isolated islands, there is still a large room for optimization in the comprehensive utilization of energy in the traction power supply system

[0005] (2) There is information isolation between the vehicle and the network, and the matching is insufficient

In the existing electrified railway system, there is information isolation between the train control and operation data and the traction power supply system, and it is impossible to realize the real-time train-ground information interaction between the traction power supply system and the train, and the information isolation between adjacent traction substations leads to the traction power supply flow Unable to match with train load demand

[0007] (3) The capacity configuration of power supply equipment in the traction power supply system is highly redundant

[0008] The length of the existing power supply arm is short and the coverage area is small. In most cases, the power cannot be transferred between the power supply arms, resulting in high equipment redundancy in the existing traction power supply system.

[0009] (4) The coordination of power supply resources and new energy consumption capacity of the railway system need to be improved

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