Power electronic transformer for through power supply

A technology of power electronics and through power supply, which is applied in the direction of electrical components, output power conversion devices, AC power input conversion to AC power output, etc., and can solve problems such as voltage ripples

CN111342680AActive Publication Date: 2020-06-26SOUTHWEST JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-06-26

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Abstract

The invention discloses a power electronic transformer for through power supply. The power electronic transformer comprises a traction transformer, a cascaded single-phase rectifier A, an isolated DCconverter A, a cascaded single-phase rectifier B, an isolated DC converter B and a cascaded single-phase inverter C. The power electronic transformer solves the problem of secondary ripples on the output side of an isolation DC converter applied to a through power supply power electronic transformer.
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Description

technical field

[0001] The invention belongs to the field of traction power supply for electrified railways, and in particular relates to a power electronic transformer applied to through power supply. Background technique

[0002] At present, there are a large number of single-phase loads in China, especially the traction power supply system in my country. The electrified railway adopts single-phase power frequency AC system. The traction power supply system is connected to the power system through the traction substation. The core equipment of the traction substation is Traction transformer. In recent years, Ynvd traction transformers and Scott traction transformers in AT mode have realized three-phase-two-phase conversion, but there are two main problems in my country's traction power supply system: electric phase separation problem and negative sequence problem. The problem of electric phase separation makes the power supply line have no electricity area, and the existen...

Examples

Embodiment Construction

[0101] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0102] A power electronic transformer for through power supply, comprising: traction transformer, cascaded single-phase rectifier A, isolated DC converter A, cascaded single-phase rectifier B, isolated DC converter B and cascaded single-phase inverter C ;

[0103] The input of the traction transformer is connected to the three-phase grid, and the output is respectively connected to the cascaded single-phase rectifier A and ...