Flexible automatic auto-passing phase separation system for electrified railway ground

Abstract

The invention provides a flexible automatic auto-passing phase separation system for electrified railway ground. The system comprises a high-voltage switch unit, a ground electric phase separation continuous power supply current conversion device and a train direction and position detection unit. The high-voltage switch unit is used for switching on / off high-voltage power supplies correlated withan alpha-phase traction bus, a beta-phase traction bus and a traction power supply arm. The ground electric phase separation continuous power supply current conversion device includes an alpha-phase side single-phase multi-winding rectifier transformer, a beta-phase side single-phase multi-winding rectifier transformer, an inverter transformer and a three-port four-quadrant converter; the three-port four-quadrant converter performs alternating current-direct current-alternating current change on an alpha-phase traction bus power supply and a beta-phase traction bus power supply which are accessed; a single-phase power supply is output through high-voltage winding of the inverter transformer and connected in series with high voltage of secondary sides of the alpha-phase side single-phase multi-winding rectifier transformer and beta-phase side single-phase multi-winding rectifier transformer, and then resultant voltage supplies power to an electric phase separation neutral section N. Thetrain direction and position detection unit is used for detecting the direction and position of a train. According to the system, continuous power supply of the electric phase separation neutral section of a contact network can be achieved so that the train can pass through phase separation with no power off and without generating electric arcs, overvoltage impact, overcurrent impact and the like.

Description

technical field [0001] The invention relates to the technical field of electrified railway catenary traction power supply, and more particularly relates to a flexible automatic phase separation system on the ground of electrified railway. Background technique [0002] my country's electrified railway traction network adopts phase-separated and segmented single-phase power frequency AC power supply. Every 30-60km, there is an isolation area of ​​about 200-900m in neutral electrical phase separation, which is called electrical separation. In addition to affecting the comfort and total running time of the catenary, and reducing the railway transportation capacity, the catenary phase separation also brings at least 80 kV operating overvoltage, which may cause damage or failure of the high-voltage equipment of the train. At the same time, Frequent excessive phase separation can easily lead to driver fatigue. Therefore, catenary phase separation has always been a high-frequency fai...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that there will still be no electricity dead zone in the neutral section in the phase commutation process existing in the existing over-phase system, and then bring overvoltage and overcurrent impact to the train, the invention provides a flexible automatic over-phase on the electrified railway ground system

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