Single-phase power supply devices, electric railway tractive power supply system and control method of electric railway tractive power supply system

Abstract

The invention discloses single-phase power supply devices, a novel electric railway tractive power supply system comprising the single-phase power supply devices and a control method. The power supply system comprises a power supply synchronous controller, a plurality of the single-phase power supply devices and a plurality of interval interconnection switches; each single-phase power supply comprises multiple secondary line winding transformers, a plurality of power conversion units and a master controller; the power supply synchronous controller is responsible for controlling effective values, frequency and phases of voltage of the whole traction network to be consistent, the single-phase power supply devices are used for converting a three-phase power supply into a synchronous single-phase power supply according to a synchronization instruction, and the interval interconnection switches are connected with all power supply intervals to form a unified whole. According to the invention, the problem about electric energy quality of a public supply network due to a traditional tractive power supply system is effectively solved, the controllable, reliable and continuous power supply is provided for an electric locomotive, meanwhile, an ice melting function is realized, and safety and reliability of the tractive power supply system are guaranteed.

Description

technical field [0001] The invention relates to a single-phase power supply device, an electrified railway traction power supply system and a control method thereof, and belongs to the technical fields of power electronic conversion technology and electrified railway traction power supply technology. Background technique [0002] In today's era of rapid development of high-speed railways at home and abroad, electrified railways provide a strong support for the rapid development of the national economy. It is reflected in three aspects of reactive power, harmonics and negative sequence. Among them, due to the popularization and application of various types of dynamic reactive power compensation (SVG, SVC), active filter device (APF) and locomotive high power factor rectifier (HPF-Rectifier), reactive power and harmonic problems have been solved to a certain extent. control, but the governance of the negative sequence component has not yet achieved obvious results. [0003] ...

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Problems solved by technology

[0007] The invention provides a single-phase power supply device, an electrified railway traction power supply system and its control method. By decomposing high voltage into multiple low voltages, three-phase evenly bearing the load, and single-phase superimposed output, it solves the problem of existing electrified railway traction. The long-standing problem of electric energy pollution in the power supply system

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