Through-type traction power supply system

Abstract

The invention provides a through-type traction power supply system. The through-type traction power supply system comprises a first traction transformer, a second traction transformer, an in-phase power supply device, an electronic switch neutral section passing device, a main substation bus and a section post; the input end of the first traction transformer is connected with a system three-phase power grid, the first output end of the first traction transformer is connected with the main substation bus, and the second output end of the first traction transformer is connected with the main substation bus through the in-phase power supply device; the input end of the second traction transformer is connected with the system three-phase power grid, the first output end of the second traction transformer is connected with the main substation bus, and the second output end of the second traction transformer is connected with the main substation bus through the in-phase power supply device; the main substation bus is connected with the traction network; and the section post is arranged on a traction network connecting the first traction transformer and the second traction transformer, and the section post is provided with the electronic switch neutral section passing device connected with the traction network. According to the invention, communication of the main substation bus can be realized.

Description

technical field [0001] The invention belongs to the technical field of power supply, and in particular relates to a through-type traction power supply system. Background technique [0002] The current electrified railway power supply system and its technology in my country belong to unilateral power supply, and there are three outstanding problems in the realization of high-speed and heavy-duty electric traction: [0003] (1) The problem of excessive phase [0004] In the traction power supply system, both the traction substation and the divisional substation are equipped with electrical phase separation: the traction substation is in the phase of out-of-phase division, and the divisional substation is in the same phase. The electrical process of overphase is complicated, the structure of automatic overphase device is complicated, the action is frequent, the life is short, and the reliability is low, and the automatic overphase failure of the traction substation will cause ...

AI Technical Summary

Problems solved by technology

The electrical process of over-phase is complicated, the automatic over-phase device has complex structure, frequent action, short life, low reliability, and the automatic over-phase failure of the traction substation will cause out-of-phase short circuit

[0005] (2) The problem of train speed and traction loss caused by electric phase separation

[0007] (3) Power quality problems dominated by negative sequence

For the electric phase separation between traction substations, there is a lack of processing capacity

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