Direct-current catenary de-icing method of high-speed electrified railway

Abstract

The invention discloses a direct-current catenary de-icing method of a high-speed electrified railway. The direct-current catenary de-icing method comprises direct-current catenary de-icing equipment input and quit processes. The input process comprises the following steps that: when a direct-current de-icing system monitors the icing state of a catenary and puts forward a de-icing demand, corresponding feeder switches and catenary switches are switched off by an electric power control center in a long distance, a substation is switched to be in a direct-current catenary de-icing operation state from a normal traction power supply state, and corresponding direct-current de-icing on-off switches, catenary switches and feeder switches in the substation are closed to input direct-current de-icing equipment. The quit process comprises the following steps that: the de-icing equipment is shut down, the corresponding direct-current de-icing on-off switches, feeder switches and catenary switches are disconnected to break the disconnection between the de-icing equipment and the substation and the catenary, and the corresponding feeder switches and catenary switches are closed to switch the feeder switches to be in a traction power supply state of an electric locomotive. According to the direct-current catenary de-icing method, the concentration and systematization of functions are realized, the operation and maintenance are safe, convenient and efficient, and the installation ways are flexible and changeable.

Description

technical field [0001] The invention relates to a DC ice-melting method applied to power supply lines in the field of electric power systems, in particular to a DC ice-melting method for catenaries of high-speed electrified railways. Background technique [0002] In recent years, my country's electrified railway construction has entered a stage of rapid development, and new high-power AC-DC electric locomotives have gradually become the main model of my country's electrified railways, especially high-speed railways. In particular, the traction power supply system is responsible for providing electric energy to high-speed trains, and is a key factor for the safe, reliable and efficient operation of trains. [0003] However, with the change of global temperature, there have been historically rare ice and snow disasters in southern, central and eastern China, especially in most parts of Hunan, Guizhou and Jiangxi provinces, where power facilities have suffered unprecedented dam...

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Problems solved by technology

This document proposes an anti-icing scheme using adjustable reactors during the skylight period. Although this scheme can effectively reduce active power loss, the disadvantage is that the power factor is relatively low (0.28-0.3), and the reactive power injected by the catenary itself into the power system High power, up to 14607kvar / h

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