Bidirectional interactive type DC (direct-current) traction power supply system base on new energy

Abstract

A bidirectional interactive type DC traction power supply system base on new energy is provided with more than two traction substations, wherein more than one transformer connected with an AC (alternating-current) bus is connected onto each traction substation; the other side of the transformer is connected with a bidirectional AC-DC converter; the other side of the bidirectional AC-DC converter is connected to a DC bus located on the traction substation; the DC bus is connected with a contact net and a steel rail; an electric locomotive is connected with the contact net and the steel rail; a section post of the DC bus is connected to the contact net of the traction substation; a DC new energy system comprising an electric automobile charge-discharge system, a distributed type power supply and more than one low-voltage DC micro-grid is arranged on the DC bus between two adjacent traction substations; and a DC circular micro-grid is formed in one power supply section. According to the bidirectional interactive type DC traction power supply system base on the new energy, distributed type new energy is fully used, and braking energy of the electric locomotive is recycled; the power supply reliability of the DC traction power supply system is improved; and bidirectional interaction of electric energy is realized.

Description

technical field [0001] The invention relates to a DC traction power supply system. In particular, it relates to a new energy-based two-way interactive DC traction power supply system that combines a distributed power supply, an electric vehicle charging and discharging system based on battery swapping, and a DC traction power supply system. Background technique [0002] With the rapid development of economy and urbanization, energy crisis, environmental pollution and traffic congestion have become serious problems facing the world today. Urban electrified transportation vehicles (subways, trams and trolleybuses) and electric vehicles can alleviate the increasingly serious traffic congestion in cities, reduce the consumption of limited fossil fuels, reduce air pollution, and achieve energy saving and emission reduction and sustainable urban development. The main means of transportation for the vigorous development of cities in the future. [0003] The development of electri...

AI Technical Summary

Problems solved by technology

[0009] Distributed power supply stand-alone access costs are high and control is difficult

Compared with the large power grid, it is an uncontrollable source, so the large power grid often adopts a limited and isolated way to deal with distributed power in order to reduce its impact on the large power grid, which greatly limits the use of distributed power

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