External power supply system of electrified railway traction station

Abstract

The invention discloses an external power supply system of an electrified railway traction station. The external power supply system at least comprises a built electrified railway traction station, a newly-built electrified railway traction station, built electrified railway traction station power supply lines and a newly-built line with an opening looped in the newly-built electrified railway traction station; a high-voltage side main connection of the newly-built electrified railway traction station is a single bus section connection, and each bus is provided with a traction transformer; the openings of two electrified railway traction station power supply lines of the built electrified railway traction station are respectively looped in two sections of buses of the newly-built electrified railway traction station to form the newly-built line; and a circuit breaker is configured at the side of the newly-built line, a section breaker is configured between the two sections of buses, and two traction transformers are respectively connected on two sections of buses via traction transformer side circuit breakers. Through the application of the novel external power supply system of the electrified railway traction station, power can be supplied to the newly-built electrified railway traction station only by newly building a line with a short opening and a 220kV power distribution interval of a system transformer substation does not need to be expanded, so that both the line corridor resource and the investment are saved.

Description

technical field [0001] The invention relates to a new type of external power supply system for traction stations of electrified railways. Background technique [0002] At present, the development of my country's electrified railway industry is advancing by leaps and bounds. Under the background of the country's large-scale infrastructure construction, the state has invested in the construction of a large number of electrified railway projects such as Wuhan-Guangzhou Passenger Dedicated, Shanghai-Hangzhou Passenger Dedicated, and Ningbo-Taiwan-Wenzhou Railway. The traction stations of these electrified railways need to be powered by the power system, and the power supply voltage level adopts 110kV or 220kV. In order to ensure the reliability of power supply, the traction station of the electrified railway adopts two power supplies for power supply, and they serve as backups for each other. When the 220kV voltage level is used for power supply, the high-voltage side of the tr...

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Problems solved by technology

[0003] Due to the rapid advancement of electrified railway construction, it is often necessary to arrange multiple electric railway traction stations in the transportation hub area where multiple electrified railways meet, and the substation resources in a certain area are limited. According to the above-mentioned external power supply method, it will take up a lot of resources. Substation power distribution intervals and precious line corridor resources, even because the nearest substation cannot be connected to the power supply line of the traction station, it is necessary to lead the power supply from a far away place, resulting in a substantial increase in investment costs

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