DC traction power supply system with braking energy recovery based on electric vehicle charging

Abstract

The invention discloses a braking energy recovery type DC (Direct Current) traction power supply system basing on electric automobile charging. The braking energy recovery type DC traction power supply system comprises more than two traction substations, wherein each traction substation is provided with more than one transformer which is connected to an AC (Alternating Current) bus, an output side of each transformer is correspondingly connected with a rectifier, output sides of all rectifiers are connected to DC buses of the traction transformers where the rectifiers are located, an anode and a cathode of each DC bus are respectively and correspondingly connected with a contact system and a steel rail, an anode and a cathode of an electric locomotive are respectively and correspondingly connected with the contact system and the steel rail, the contact system between adjacent traction substations is connected with one zoning station, two ends of the zoning station are respectively connected with the anodes of corresponding DC buses, the DC bus between two adjacent traction substations is provided with an electric automobile charge-discharge system, the electric automobile charge-discharge system is connected with the DC bus between the two adjacent traction substations, and thus a DC circular microgrid can be formed in one power supply zone. According to the braking energy recovery type DC traction power supply system disclosed by the invention, the reliability of the DC traction power supply system can be increased.

Description

Technical field [0001] The invention relates to a DC traction power supply system. In particular, it relates to a braking energy recovery type DC traction power supply system based on electric vehicle charging that combines an electric vehicle charging and discharging system based on battery exchange 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 (metro, tram and trolleybus) and electric vehicles can alleviate the increasingly serious traffic congestion in the city, reduce the consumption of limited fossil fuels, reduce air pollution, and realize energy saving, emission reduction and sustainable development of the city. The main means of transportation for the vigorous development of future cities. [0003] The development of electric vehicles requi...

AI Technical Summary

Problems solved by technology

[0006] However, in the existing DC traction power supply system, the power factor of the main substation on the AC side is very low during the trough and outage of the electric locomotive, and reactive power compensation measures are required

Images