Traction power supply system of electrified railway novel AT power supply mode applying 2 multiplied by 27.5kV outdoor modular appliance

Abstract

The invention relates to a traction power supply system of an electrified railway novel AT power supply mode applying 2 multiplied by 27.5kV outdoor modular appliance, comprising a traction substation arranged at the side of the electrified railway; the output side of the traction substation is connected with an ascending / descending traction network; the middle parts and the tail ends of power supply arms of the ascending / descending traction network are provided with parallel devices with parallel power supply function; an electrical split-phase position between the power supply arms of the ascending / descending traction networks of two adjacent traction substations is provided with a skip zone device with skip zone power supply function; the parallel devices are connected with an AT device; the parallel devices comprise four parallel power supply units which are parallel modules for power supply; and the AT device comprises four integrated AT stations which comprise a first AT transformer, a second AT transformer and a modular appliance used for the AT stations. The traction power supply system has small occupied area, can reduce investment cost, and has high reliability and free of maintenance.

Description

technical field [0001] The invention relates to a traction power supply system of an electrified railway AT power supply mode. Background technique [0002] Traction power supply systems for electrified railways such as high-speed railways, passenger dedicated lines, and heavy-duty railways at home and abroad mainly use 2×27.5kV AT power supply mode to meet the power consumption needs of electric locomotives. The traction power supply system of the AT power supply mode is mainly composed of traction substations, subdivision substations, AT substations, and traction network, and adopts a parallel power supply mode in which the middle of the power supply arm passes through the AT substation and the end passes through the subdivision substations (for details, see figure 1 ), the impedance of the traction network in this way is small, which can reduce the voltage loss of the traction network and improve the quality of power supply. The 2×27.5kV equipment in each institute mainl...

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Problems solved by technology

[0031] In order to overcome the disadvantages of the AT power supply mode of the existing electrified railway traction power supply system which occupies a large area, high investment cost and troublesome maintenance, the present invention provides a , Incoming (outgoing) line corridors and power supply lines, production houses, and transportation roads are modular electrical appliances used in parallel power supply and cross-regional power supply; reduce the area occupied by AT stations and traction substations, reduce investment costs, and have high reliability New AT power supply mode for electrified railway traction power supply system applying 2×27.5kV outdoor modular electrical appliances with high reliability and maintenance-free

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